Craftsman 161210400 Engine Analyzer Operating instructions
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owners manual
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MODEL NO.
161.210400
CRRFTSHRN
ENGINE ANALYZER
FOR 12& 24 VOLT SYSTEMS
Caution:
Read Rules For
Safe Operation and Complete
Operating Test
Procedures
Carefully
. OPERATING INSTRUCTIONS
• SAFETY RULES
• TUNE- UP PROCEDURES
• REPAIR PARTS
............
•........
. .....
,, ,,,, , ,, ,,,,,, , ,I ..........
' I I II Illl 11 IIIIIII IIII
11
SEARS, ROEBUCK AND CO. U.S.A.
CHICAGO, ILLINOIS 6068.4
......
2-17070_
PRINTED iN U.S.A.
TOT Numld
TEST 34€-*Lo_ v_XAG[ OnOP ................................
T[S? _UHO_X _I_--E|SStOII COtI_O. $#;1_ TIE.los
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TEST _U_ER
HF-_ lii--l[Ai illIIlllNGS ........................................
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R(ILAc[,MENI e,',_T_LIST .................................................
IMPORTANT
The information in thls manual will serve as a generaJ gulde for engine
tune-up and charging system tests and adlustments.
CONSULT THE VEHICLE SERVICE MANUAL FOR SPECIFIC TUNE..UP
INFORMATION AND TEST PROCEDURES.
ALWAYS FOLLOW THE
MANUFACTURER°S SPECIFICATIONS AND TEST PROCEDURES FOR
ADJUSTING DWELL ANGLEe IDLE SPEED AND CHARGING SYSTEM
OUTPUT, ESPECIALLY VEHICLES WITH MODERN ELECTRONIC
IGNITION AND EMISSION CONTROLS.
DO NOT ATTEMPT TO
SERVICE VEHICLE WITHOUT MANUFACTURER'S INSTRUCTIONS.
The following Is a list of publishers who have service manuals available for your
specific vehicle at a nominal cost. Write to them for availability and prices, specifying
the make, style, and model year of your vehicle.
A. E. A. Tune-Up Charts
Automotive Electric Assn.
130i W. 22nd St., Suite 202
Executive Plaza Building
Oak Brook, Illinois 6052%
National Service Data Book
National Automotive Service, Inc.
Div. Glenn Mitchell Manuals, Inc.
Box 10465
San Diego, Ca]ifornia 92110
Chilton_s Auto Repair Manual
Chllton Company
56th and Chestnut Streets
Philadelphia, Pennsylvania 19139
Chrysler Corporation
Service Publications Dept.
26001 Lawrence Ave.
Center Line, Michigan 48015
GM Diagnosis and Repair Manual
GM DR Manual Headquarters
P. O. Box 1185
Southfield, Michigan 48075
Motor's Auto Repair Manual
250 W. 55th Street
New York, N. Y.
10019
Helm Incorporated
P. O. Box 07150
Detroit, Michigan 48207
FULL 1 YEAR WARRANTY
IF, WITHIN 1 YEAR FROM THE DATE OF PURCHASE, THIS AUTOMOTIVE TEST
INSTRUMENT FALLS DUE TO A DEFECT iN MATERIAL OR WORKMANSHIP,
RETURN tT TO THE NEAREST SEARS STORE THROUGHOUT THE UNITED STATES÷
AND SEARS WILL REPAIR OR REPLACE iT, FREE OF CHARGE.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO
HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.
SEARS, ROEBUCK AND CO,
DEPARTMENT 898/731A
SEARS TOWER
CHICAGO, IL 60684
Wage
Read this Owner's Manual and these
Rules for Safe Automotive Testing corefully.
Fa_iure to Follow instructions
and safety _ies could result tn serious bodily _nlury and/or damage to the
Instrument.
2_
Beforestarting the englne_ set the park.,
Ing brake and place gear selector In
NEUTRAL an standard transmissionsor
PARK on automatic transmission.
3_
The carbon monoxide in exhaust gas is highly toxic.
To avoid asphyxiation, alway_ operate vehlcle In a well.. ventilated area.
if vehicle Is In an en-
closed arean exhaust should be routed dtrectly to the outside via leakproof exhaust hose.
e
When operating any test instrument from
on auxiliary battery+ connect a jumper wlre between the negative terminal of
the aux_llary battery and chards ground
on the vehicle under test for negative ground systen_h For positive ground
systems+connect the jumper wire to the
positive terminal of the auxll _ary battery
and chosdsground an the vehicle.
When working in a garage or other en-
closed area, auxii la_ battery should be
located at least 18 Inches above the floor
to minimize the potsibllity of spork_
;gniHng gasoline vaporsand causlng an explosion.
,
An automobile battery Is €apable or pm-
duc|ng very hlgh currents.
Therefore,
exercise reasonable care when working
near the battery to avoid electrical connections through tools, wristwatch, etc.
B
Avoid contact with battery electrolyte.
It can eat holes In clathlng, burn skin and cause permanent damage to eyes.
Always wear q_iash proof safety goggles
when working around the battery, if
battery electrolyte is splashed in the eyes or on skln, immediately flush the
affected area for 15 minutes with large quantities of clean water. In case of eye €ontact0 seek medical a_d, e
The gasesgenerated by a chargtng bat-.
tory are highly explosive.
Do not smoke or permit flame or spark to occur near o battery at any tlme+ particular- ly when it Is charglng.
Any room or
RULES FOR SAFE AUTOMOTIVE TESTING
READ CAREFULLY
comportment€ontaining charging bat..
terles should be well ventilated to
prevent accumulaHon of explosive
gases. To avoid spark_, do ru_tdisturb
the battery charger connectlonswhile
battery is charglngs and always turn charger off before dlsconnecti_'gthe battery clips.
When removing or re-
connecting battery cables, make sure
Ignition switch and all acce.orles
are
turned off.
v
Never add acid to a battery once the battery has been placed In service.
Doing so m_y result in dangerous spattering of electrolyte o
9_
Keep hanch, halr_ necktie, loose
clothing and test leads well away from
fan blade, fan belt_ power steering
belt, air conditioner belt and other
moving engine parts_ as serious injury could result from entanglement.
10.
Do not touch hot exhaust manifold,
radiator or hlgh-voitage spark plug and coil ter_nlnals.
Spark voltages ore nat normal ll) lethal but an tnvotuntmy lerk of the handsor armscaused by
electrical shock m_ result in Injury,
II.
Never took dlre:tly Into carburetor throat while engine is cranking or
running. A sudden backfire can cause serious burns. i2.
To avoid the possibility of a flash fire, do not smoke or permit flame or spark
to occur rear carburetor_ fuel line+ fuel filter, fuel pumpor other poten-
tial sources of spilled gasoline or go$ol|ne vapors.
13.
Never remove radiator cop while the engine is hot.
Hot €oolant escaplng
under pressure can cause serious burnt.
14.
The jack supplied with the vehicle
shou|dbe used on|y for changing wheels.
Never crawl under car or run engine
while vehicle ls on iack.
15.
When making electrical test connec-
tions to the vehicle, do not use the carburetor or other fuel system compo-
nents as a ground connectlon_ as a
spark could lgnffe the gasoline vapors
and cause a fire or an explosion.
_ge J
DESCRIPTION
I •
METER.
Provides following scales-
Low Ohms X 1, 0 to 1,000 Ohms (10
Ohms center scale), HI Ohms X
1,000, (10,000 Ohms center scale)t
RPM Hi 0-6000, Lo 0-1200 RPM,
Volts 0-i6 Lo, 0-32 Hi. Dwell 8 cyl. _)-45 a , 4 cy!. 0-90 °, 6 cyl.
0-60 , Amps, Parers 0-3.2
Volts1
AIte rnator-good/defective zones.
FRONT PANEL AND CONTROLS
FIGURE I
6.
BLACK - OTHER TESTS SOCKET. In-
sert BLACK plug on test lead.
•
OTHER TESTS SELECTOR SWITCH.
Always place switch In CENTER posi- tion for all tests, indlcoted by functlon switch (No.B) above.
Use left hand posltlon for charging Amps and right hand positton for starting Amps.
ALWAYS return switch to center posltlon when
Amp$ test is completed. e
ZERO ADJUSTER.
Meter painter adjustment, if pointer is not on zero, slowly rotate this plastic slotted screw right or left to set pointer on zero line.
Check before testing.
4_
.
RED AMPS SOCKET.
on Amps lead.
Insert RED plug
WHITE OHMS SOCKET.
plug on Ohms lead.
Insert WHITE e
BLUE RPM PICK UP SOCKET.
Insert
Blue plug on inductive pickup lead.
.
FUNCTION SELECTOR SWITCH.
Used to select meter range for each test.
A description of each test function is described on page 4.
.
RANGE SELECTOR SWITCH.
Select for HIGH or LOW scale range for VOLTS,
RPM, or OHMS depending on the test being performed.
Function Selector
Alternator RPM InducttveTach m m D
Volts__,
Points m well
_ Ohms
FUNCTION SELECTOR SWITCH POSITIONS
FIGURE 2
POINTS.
3.2
Volt Lo scale-provldes point condition on scale.
Also used for locating voltage drops in elect.. rlcal starting and charging system.
m
VOLTS.
Used to Indicate battery
charging and starting cor_ditlons.
Use 16 volt Lo scale for t2 volt systems_ and 32 volt (HI) r_ale for 24 volt
systems•
4.
RPM.
Provides i200 or 6000 RPM engine speed reading.
See item #9
Page 3.
Use Lo-i200 RPM range fat all Lo speed carburetor idle tests and Hi6000 RPM range for high speed tests.
5.
DWELL.
Used to check point dwell on breaker polnt ignitton systems.
Read 45 ° scale fo[ 8 cvi.o
60 ° scale for 6 cyl, and 90" scale for 4 cyt.
engines.
.
ALTERNATOR.
Indlcates alternator condition on GOOD or DEFECTIVE
sca'te wlth englne running. It w(ll detect open or shorted diodes or windings.
.
OHMS.
HI & Lo used to measure electrical resistance in Ohms, on ignition cables, ballast resistOrSeor ignition coil windings.
Select HI or
Lo position.
See Item 19 Page 3.
..................................................
IMPORTANT: i i i iiillll illrlll[ i iii ii ...................................................
The above function tests will
NOT WORK on meter unless other
tests selector sw(tch4, ITEM
Nc.
7 Page No.
3) Is in CENTER
POSITION for OTHER TESTS.
NOTE: The Ohms test operates from an internal 9 volt battery and ;ncorperates
automatic Internal zero calibration.
No external zero adjustment ;s required.
IGNITION J
KIT
ACCESSORIES
FIGURE 3
I.
2_
BATTERY POST ADAPTER.
Used in electrical systems tests with i00 Amp and 400 Amp shunts.
SIDE MOUNT ADAPTER.
Used with
Battery Post Adapter on batteries with side terminals.
5_
.
JUMPER LEAD. Used in electrical systems tests.
d
ALTERNATER FIELD PLUG CONNECT-
OR.
Used in "A" & "B" circuit alter-. nator output tests.
DOMESTIC
Used to
SPARK make
PLUG ignition
ADAPTER.
cable tests.
4t
FOREIGN SPARK PLUG ADAPTER.
Used to make ignition cable tests.
G.M.
DIAGNOSTIC CONNECTOR.
ADAPTER.
Used to make tests on
G.M.
cars equipped with the diagnostic connector.
.
PRIMA!RY
COIL ADAPTER.
Used to provide easy hook-up on ignLtion systems with insulated call primary connecHons.
9_
H.E.i.
ADPTER.
Used to provide
Dwell connection on G.M.H.E.I. systems.
_'_ .....................
Itrtrnlnrlrllllllrlrlll .................................................................................................
................................................
' ..........................
TEST LEADS
FIGURE 4
The plugs and sockets are pol- arized to insure correct attachment.
The socket has a groove on each top corner.
The plug has a mating ridge on the inside of the top corners.
BLACK
RED
POINTS, VOLTS, j
AND DWELL ...................
_m,._
AMPS ....
_-I_€; r*
BLUE
RPM
LEAD
PLUG
_ k_
PANEL
SOCKET
_m,..
WHITE
OHMS
v_,a_,.,/l_ll_lr'1_,.
I IUI_I_'.'_
BREAKER POINT CONVENTIONAL
I,, METER ZERO ADJUSTER.
2.
Before connecting any test leads, always check meter po_nter zero position, if not on zero, slowly rotate adjuster with proper size flat screwdriver and set point-
er on zero line.
LEADS.
insert all three test leads into matching color sockets on panel.
Connect leads as illustrated below.
3.
Install battery post adapter on the negative shown.
ground battery terminal as
4, Connect RED clip to battery positive
(+) termlnal,
5.
Connect BLACK clip to battery negatlve (-) GRD terminal, run r-t_l_C.lll_iL
I r..,.._ t O
IGNITION SYSTEMS
6_
9.
,
,
10.
Connect the GREEN clip to the dis,. tr_butor termlnai on call primary.
Attach RPM induction pickup to a spark plug cable as close to dlstrtbutar cap as possible. ,Jaws must be fuliy closed.
DO NOT cc_nect OHMS clip.
I
Engine must be at operating temperature before testing, Proceed with tests as outt_ed in this manual.
Starter Amp shunt must remain closed at all times except for charging system test as indicated. Damage to
Battery Adaptor can occur if the above instruction is not followed,
JAWS MUSTCLOSE SO UPPERAND LOWER yPLUG
PoLE ACH'o'r.ER
WIRE TO E
THIS GAP tEEN
TACH PICK-UP MUST BE AS
CLOSE TO DISTRIBUTOR CAP
AS POSSIBLE
CLOSE STARTER
SHUNT FOR
STARTERAMPS
OPEN FOR
CHARGING
AMPS
®
RED
TO GROUND
ON ENGINE
_-_ iSE NUTS MUST
BE TIGHTENED WITH
A WRENCH.
TI EN
THIS SCREW
I'O STARTER AND ALTERNATOR
FIGURE
RED
SCREW POST INTO BATTERY
TERMINAL BEFORE INSTALLI
BATTERY POST ADAPTER,
CONNECTIONS FOR ENGINE TESTS
ELECTRONIC IGNITION SYSTEMS
Connect test leads as instructed on
previous page for BREAKER POINT systemsand as illustrated below with the following exception; See Test Number
15 far proper connection of the GREEN clip.
Proceed with tests as outlined in this manual--Oral fling those tests which
apply only to BREAKERPOINT SYSTEMS
Engine must be at operating temperature before testing.
SEE PAGE No.
6 FOR NUMBER IDENT-
IFICATION.
Always close starter shunt b6fore starting engine.
_PLUG WIRE TO BE
®
JAWS MUST CLOSE SO UPPERAND LOWER
POLE PIECES TOUCH EACH OTHER i
BLUE
_LACK
RED
CLAMP TACH PICK-UP MUST BE
CLOSE TO DISTRIBUTOR CAP AS
POSSIBLE
®
IEEN
CLOSE
STARTER
OPEN
See Test
Numbe r 1.5for
connection
DISTRIBUTOR
STRIBUTOR MAGNETIC
_ICK-UP CONNECTOR.
)BLACK
®
GROUND
ON ENGINE
NUTS MUST
BE TIGHTENED WITH
EN
THIS SCREW
A WRENCH.
STARTER AND ALTERNATOR
Test Number 1--Startin_ and Crank ing_Vg.!tage,
I.
Place function switch in the VOLTS position.
Engine must be disabled to prevent Starting for this test.
On ELECTRONIC IGNITION, disconnect battery cable at coil or unplug pickup coil connector at distributor or ground HT secondary lead on any external coil system.
,
2.
Close starter amp shunt (See page 6, Figure 6) before operating starter.
3.
Have an assistant turn the ignition switch to the START position and operate starter for 15 seconds.
Observe battery voltage reading with engine cranking, (Figure 8).
4.
A battery in good, fully charged condition should read a steady 9 volts or more.
5.
If the battery voltage reads below g volts, recharge battery to full charge condition.
6.
Excessive fluctuating voltage reading (over i volt) can be caused by a starter in poor condition due to worn bearings, dirty commutator, a defective battery or corroded starter cables, Clean, tight connections are a must throughout the starter system.
STARTING AND CRANKING
VOLTAGE TEST CONNECTIONS
FIGURE B
BA TTERY V OLTS
BLACK
CLIP
RED
CLIP
SOLENOID
L
TERMINAL"S"
STARTERMOTOR GR BATTERY
Test Number_2-,Starter Current Draw
I.
Place center slide switch to the right hand starter amps position.
Operate starter and note starter current on the 400 Amp scale, (Figure 10),
Compare to specifications.
IMPORTANT--Always return switch to center position for other tests when amps reading is compieted{AZ_o _¢e F_gu_e 15J.
2.
If battery-starter test is normal (a steady reading over 9 volts), proceed to Test Number 4_Cha_gingS_stemVg]tage and Current.
Page 9
CLOSE STARTER
SHUNT FOR
STARTER AMPS
OPEN FOR
CHARGING
AMPS
BLACK
RED
TO GROUND
ON ENGINE v
NUTS MUST
BE TIGHTENED WITH
A WRENCH.
TIGH!
THIS SCREW
STARTERAND ALTERNATOR
Conn_c_on_ For S_J_uzt_.ng il C,ho_rg_ng
CuArent Measurements
FIGURE g
Test Number 3--Starter Circuit Voltage_..Loss
S_t_ v
STARTERAMPS
C_r{nt .,c_it_h
FIGURE 10
Po_Z_Zon
I.
Disconnect all tester leads.
Use only the BLACK PLUG battery-dwell lead for this test.
Use the BLACK and GREEN test clip for voltage loss tests.
2.
Place function switch in POINTS position and read 3 volt points scale.
Each division is .I volt.
3.
Disable engine to prevent starting by grounding HV iead of the coil as shown below.
On HEI or electronic systems disconnect battery lead at coil or unplug distributor pickup coil connector.
4.
Refer to starter system illustrated below.
Connect GREEN and BLACK clips across each section of circuit shown by numbers (i-2-3-4 etc.).
5.
All readings must read .2 volts (2 div) or less for normal conditions.
Reverse test leads if meter reads backwards.
6.
High readings will be caused by corroded or loose connections at battery terminals, cables or a worn solenoid.
®
Connect_Lon,s For Vo.&_ge
Lo_S M_asu_r_ments
FIGURE 11
®
STARTER
va_ iu
7, Remove and clean battery terminals and cable terminals in a warm water solution with baking soda to dissolve corrosion, Tighten nuts on starter solenoid terminals.
Readings below B volts at the starter usually indicate a defective starter cable or burned solenoid contacts.
Replace defective parts as required for good starter performance.
8.
Replace worn or corroded cables as required to correct condition.
g.
Do not crank for mor_ than 15 seconds at a time, Allow starter motor to cool off for 30 seconds between tests,
10.
When tests are completed, reconnect coil for normal starting.
The function of the charging system is to keep the battery In an optimum state of charge, to provide the necessary current to start the engine, and operate the electrical systems when the engine is running.
The battery is charged by an alternator that is driven bye belt connected to a pulley on the engine crankshaft.
The alternator generates an alternating current (A, C.
) that is converted by internal diodes Into direct current (D. C,) to charge the battery, A regulator is needed in the charging system because the alternator output voltage increases as the engine speed increases, The regulator keeps the alternator output voltage at a safe upper limit so the battery will not be overcharged and the headlights and accessories will not be damaged by excessive voltage.
I.
Place function switch in the VOLTS position.
The Center Slide Switch
must be in the OTHER TESTS position.
2.
Slide the RANGE SELECTOR switch to the LOW range(O-16 volts) for
12 volt systems or to the HIGH range (0-32 volts) for 24 volt systems.
Read test results on the appropriate VOL_S scale.
3.
Be sure the shunts are in position on the Battery Amps Adapter as
shown in Key No.I Page 5, before starting the vehicle.
CAUTION: TIGHTEN ALL NUTS ON THE BATTERY ADAPTOR FIRMLY WITH A WRENCH
TO AVOID EXCESSIVE HEAT AND POSSIBLE SHUNT DAMAGE.
4.
Before performing Step 5, start the engine and allow it to run for
10 to 15 minutes or until the engine compartment is warm, then shut it off. In order to obtain proper results from this test, the battery must be partially discharged.
To accomplish this, switch
on the headlights and put the blower on HIGH for a minimum of one minute, or remove the distributor wire to prevent the car from starting and crank the engine for about 30 seconds, then follow step 5,
5, Start the engine.
Operate at a fast idle (approximately 1500 RPM).
Open the starter amps shunt.
Note the battery charging voltage.
The meter should read over 12 volts and slowly rise to regulated voltage in a few minutes (15 I/2 volts maximum).(Figure 12)
6.
Move the Center Slide Switch to the CHARGING AMPS position and note the alternator charging rate compared to vehicle specifications.(Figure 12)
Shortly after starting, an alternator in good condition should charge from 50 to 80% of its rated capacity, and slowly decrease as the battery regains its charge.
The charging voltage will slowly rise as the ampere rate decreases and maximum regulated voltage Is obtained.
7.
Move the Center Slide Switch tO the OTHER TESTS position again for voltage reading and operate the engine at fast idle until the
charging voltage stops increasing.
Note the maximum voltage and compare to vehicle specifications.
8.
If the charging voltage exceeds IB I/2 volts or as specified, replace
or adjust the voltage regulator.
If the voltage reading is too high, the defect could be:
CHARGING
AMPS
CHARGING
V OLTS
Page 11
DEFECT
ACTION
A.
High resistance in the ground circuit
Clean and tighten all ground connections
B.
C.
Regulator set too high
Defective regulator
Adjust to the proper setting
(If adjustment is possible)
Most late model vehicles use a regulator which is of solid
state design and cannot be adjusted.
These must be replaced when they are defective,
Replace Regulator if the voltage reading is too low, the problem is either in the alternator, regulator, or the battery.
9.
If charging voltage DOES NOT slowly INCREASE, this may indicate a defective alternator.
Rotate the Function Switch to the alternator position, turn lights on and operate the engine at approximately 1200
RPM.
Read the aiternator scale. A reading in the gray defective zone indicates defective diodes or windings in which case the alternator diodes and windings are functloningproperly.(Figure 12).
10.
If a low or no charging rate is indlcated, check alternator output under full field conditions by removing voltage regulator control action.
(See pages 12& 13 for connections.) To apply full field voltage for maximum output, refer to vehicle specifications to determine whether type "A" or "B" system is used for proper field bypass connections.
ENGINE
GROUND
BLACK
ALTERNA TOR
CONDITION
ALTERNATOR
RED
CLIP
VEHICLE
12 VOLT
WIRES
TO REGULATOR
BATTERY FIGURE 12
"J_'/ CHARGING AMPS & VOLTS
Page 12
IIATTERY _ft tCtlONS
AOAPTI[R CONN-
ItOlt ALTERNATOR Tilt
FIGURE 14
CHARGING
AM ,s
FIGURE 13 ot_,r_
V gill
NOTE: If the AMPS indicates below zero (left) during CHARGING or
STARTING, reverse the leads as shown,
Caution: DO NOT pull on the wires, if necessary_ grasp the terminal with pliers tO remove it,
FIGURE 15
FIGURE 16
Remove field lead (green wire) from the alternator field terminal.
Connect iumper wire from the alternator field terminal to ground.
Battery
Output
Terminal
Remove
Field Lead
Plug
(Green
Wire)
FIGURE i7 A
Field Terminal
(Horizonhal)
CHRYSLER
Jumper
Connect Jumper
to ground
Field Terminal
(Vertical)
(Blue Wire)
JJL ......
_.....................
Remove cap from the field terminal.
Connect jumper wlre to field terminal and ground.
Ground Terminal
Stator
Terminal
!
Field
FIGURE
Term;hal
17 C
Regulat_
Terminal
INTEGRAL DESIGN
FORD Regulator
Insert screwdriver not more than I inch in end frame hole, ground tab
to frame with screwdr;ver.
No additional adapter is needed.
FIGURE 17 B
(to Ignition Switch)
DELCO
Exclte' Terminal
"A" CIRCUIT
(Electronic Voltage
Regulator)
Tab
End
Frame
Hole
Remove Cap
Ground with
Jumper Wire
\
"B" CIRCUIT ( External Voltage Regulator)
II II]llllllnll I IIIIIIIIII II .................
FIGURE 18 r ....................................................
Battery
Term _nol
Jumper
On some vehicles if may be inc_onvenlent to connect the iumper wlre at the alternator.
Im such a iftuaHon remove the regulator con-
nector from the voltage regulator and €onnect a iumper wire as illustrated.
i'_e 13 bisconnect
F_eld Lead
Plug
C HR YS LER
Te
_1
Remove field lead from field terminal.
Connect iumper w_re from positive
terminal of battery to the field lead.
ignition
DELCO
Stator _"_\
Di,conoe=t/ __./7,_
Jumper
/
F;et
Gr°umd__B_attery
FORD
........................................................................
Term;hal
Battery,
Ignition Switch
Jumper
Batter
Regulator
Commector
Field
Field Stator
ru_E _
I.
Be sure the shunts are tightly secured to the Battery Amps Adaptor as shown in Key No. I Page 5 , and the Function Selector Switch is placed in the Alternator position.
CAUTION: TIGHTEN ALL NUTS ON THE BATTERY ADAPTOR WITH A WRENCH TO
AVOID EXCESSIVE HEAT AND POSSIBLE SHUNT DAMAGE.
IF YOU ATTEMPT TO
START THE ENGINE WITH THE SHUNT DISCONNECTED, THE 1/40HM RESISTOR
MOUNTED ON THE BATTERY ADAPTOR MAY BLOW OUT.
2.
Start the engine, then carefully disconnect the slotted ends of the shunts as shown in the figure below.
Turn the headlights on and operate the engine at approximately 1200 RPM and observe the alternator condition scale.
3.
A reading in the RED GOOD ZONE on the meter indicates that the alternator windings and diodes are satisfactory.
4.
A reading in the GRAY DEFECTIVE ZONE indicates that one or more diodes are open or shorted or that the stator winding is open or shorted to ground or has shorted turns.
Refer to Tests 9 and 10
Alternator Diode, Statorand Rotor Tests for further testing.
IMPORTANT: Refer to vehicle specifications to determine whether type
"A" or type "B"system is on the vehicle, Also check the rated output of alternator on the nameplate or specifications listing,
1.
To perform this test, it is necessary to ground the field in the type A Circuit or remove the regulator from the charging system and
energize the field in the Type B Circuit.
This provides full field operation and the alternator will charge at its maximum rated capacity,
2.
Place the FUNCTION SELECTOR Switch in the VOLTS position and slide the Center Slide Switch to the AMPS CHARGING position.
3, On the Type A Circuit, ground the field as shown on page 12, proceed with Step 5 below.
4.
On the Type B Circuit, disconnect the wiring harness plug from the regulator and energize the field as shown on page 13.
5.
Before starting the vehicle, be sure the shunts are connected to the
Battery Amps Adapter as shown in Key No. I on page 5 • Turn on the headlights and set blower speed to high.
The meter should read to the left of zero or "backwards".
If it reads up scale, reverse the shunt connections as shown in Figure 1 5.
Turn all lights and accessories "OFF".
Start the engine and operate it at the speed recommended by the manufacturer for alternator output test.
Unless otherwise specified, adjust engine speed as follows:
Chrysler
GM-Delco-Remy
Ford
1250 RPM
2500 RPM
2900 RPM
With the engine running, carefully open the starter shunt as shown in Key 10 on page 6 .
Observe the current (amps) reading on the
0-100 Amps scale, reduce engine speed to curb idle and compare meter reading with the manufacturer's specifications.
ALTERNATOR FULL FIELD
NOTE: To determine the actual output current, add 5 amperes to the meter reading obtained during the output test.
This is the approximate current used by the ignition system, dash instruments and alternator field toll
combined which does not reach the battery to be measured during this test.
If the meter reading is at or higher than specified, the alternator output is satisfactory.
If the meter reading Is less than specified, a loose or worn alternator drive belt, a faulty field or battery wire to the alternator, or a poorly grounded or defective alternator is indicated.
If the meter reading is to the left of zero, a broken field wire or a defective alternator is indicated.
(Meter reading is the battery discharge current used by the ignition system and dash instruments.)
6.
When test is completed, shut off the engine, disconnect jumper lead, remove the shunt, and reconnect wiring harness plug, connector or field wire to the regulator for normal operation,
Page 15
Repeat Test Number 4:±Charging System Vp]tage and Current
If the voltage reading is within the range as specified by the vehicle service manual, (typically between i3.8 and 15.2 volts on 12 volt systems, and 27.6 and 30.4 on 24 volt systems) the regulator is satisfactory.
If the voltage reading is out of specifications but satisfactory operation was obtained on the CHARGING SYSTEM VOLTAGE AND CURRENT and
ALTERNATOR CONDITION tests, the voltage regulator should be adjusted
(if possible) or replaced.
Test Number B--Battery
Repeat Test Number4-,ChargingSystemvo]tage and Current
After the VOLTAGE REGULATOR--TEST 7 is completed, the regulator should be functioning satisfactorily, leaving the battery as the only untested component remaining in the CHARGING SYSTEM.
To test battery condition, attach the shunt to the BATTERY POST ADAPTER (Key I Page 5 ), start the engine, and operate it at approximately 1200 RPM.
If the voltage reading is less than 13.8 volts, check the water level in the battery and fill to the proper level, if necessary.
Charge the battery and repeat this test.
if the voltage reading is still low, the battery is defective and should be replaced.
Page 16
Test Number 9--Ohms Test
1.
The ohmmeter test is powered by an internal zero calibration is required by the operator.
9 volt battery.
Place Function
No
Selector Switch in the Ohms position and select either the Hi or Lo range to match the component under test.
(X i or X lOOd)
2.
CONNECTIONS: Insert the white Plug Ohms Lead into the corresponding tester socket as illustrated below.
3.
OPERATION: The meter will read full scale at INF.
with cllps,open, and when the clips are connected together will read zero on the left.
(See Paragraph #6.) To measure resistance, connect the clips to the component to be tested and read the prope_ Ohms scale.
(X 1 or
x 1ooo)
4.
IMPORTANT CAUTION: ALWAYS disconnect ALL L£ADS from any electrical part to be tested on the vehicle.
Failure to observe this caution may result in damage to the tester.
5.
Refer to manufacturer's specifications for normalresistance value of any part being tested, ignition cables, ballast resistor, coil windings, etc.
OHMMETER BATTERY
The 9 volt battery ts located in the rear compartment,
Observe correctt polarity when installing battery.
WHITE PLUG
FIGURE 19
CONNECTIONS
RED BLACK
I i
SECONDARY
OHMS
IMPORTANT: 9 VOLT BATTERY ( SEARS #
64i7) IS NOT SUPPLIED WiTH THIS ANA-
LYZER.--OHMS CIRCUIT WILL NOT WORK
WITHOUT BATTERY.
OHMS TESTS ON VARIOL
VEHICLE COMPONENTS
PRIMARY
OHMS
1
FUSE
BA LLAST RES ISTOR
COIL
6.
BATTERY REPLACEMENT.
When the g volt battery is low, the meter will not read full scale with the clips open.
Replace the battery to obtain accurate OHMS measurement.
7.
IMPORTANT: When the tester is not in use or when Ohms tests are completed ALWAYS turn the Function Selector Switch OUT of the
Ohms position to prevent battery discharge.
DIODE TESTS ON OHMS X 1000 POSITION
Alternator diodes in a disassembled alternator can be tested for "shorts" or "opens" with the stator leads disconnected as illustrated.
To facilitate checking the diodes in the end frame and heat sink, place a short length of wire or nail in the jaws of the RED and BLACK test clips as shown in the illustration.
Touch the RED lead to the diode case and the BLACK lead to the diode lead as illustrated in Step A and note the meter reading,
Reverse the lead connections on the same diode and again note the reading as in Step B.
A good diode will have one low and one high reading, if both readings are very low, or if both readings are very high, the diode is defective and should be replaced.
Page 17
WHITE PLUG
RED
RED
Initial Connection
FIGURE 20
ALTERNATOR DIODE TESTS
STEP
LACK
See steps 1-7
TestNumberg--OhmsTest for Ohmmeter use
ROTOR AND STATOR TESTS ON OHMS X 1000 POSITION
Rotor--
The alternator rotor may be tested for open or grounded field coils.
To check for opens, touch the test leads to each slip rJng.
If the meter reading is near zero, (left end) the winding is not open.
If the meter shows high reading (extreme right end of the scale), the winding is open and the alternator should be repaired or replaced.
To check for grounds, touch the test leads from either sllp ring to the rotor shaft or to the rotor poles.
If the meter shows only a slight reading or none at all, the field winding is not grounded.
If the meter reading is near zero
(left end), the winding is grounded and the alternator should be repaired or replaced.
Stator--
The alternator stator windings may be checked for grounds or opens. Disconnect the three stator leads from the diodes before any test.
To check for opens, successively connect the tester leads between each pair of
stator leads.
In each case, if the meter reading is near zero (left end), the windings are not open. If the meter shows a high reading, the winding is open and the alternator should be repaired or replaced.
To check for grounds, connect the tester leads to each stator lea_ and to the frame.
If the meter shows a full scale reading, the stator is not grounded, if the meter is near zero (left end), the stator winding is grounded to the frame and the alternator should be repaired or replaced.
The purpose of this test is to confirm the presence of supply voltage to the positive (+) or Battery (Bat) terminal of the Ignition Coil.
NO
VOLTAGE AT THIS POINT RESULTS IN A "NO START" CONDITION,
Perform this test as follows: lm
2.
Place the Function Selector Switch of your Craftsman Analyzer in the
VOLTS position.
Place the RANGE SELECTOR in the 0-16 volts position.
Insert the BLACK OTHER TESTS lead in its corresponding socket on the
Analyzer.
Connect the BLACK clip to a good vehicle ground such as the engine block or negative (-) battery post.
Connect the RED
clip to the to the positive (+) or battery_at) terminal of the i__ nition coil.
In the case of the General Motors HEI Syste_,,disconnect
_-e_Tn_ttery (Bat) lead at the Distributor (on Integrai Coil
Systems) or at the coll (on External Coil Systems).
Insert the GM
Diagnostic Connector, Page 5 , Key No, 7 into the socket of this disconnected wire and connect the RED clip to the adaptor.
IMPORTANT: DO NOT ALLOW THIS CONNECTION TO TOUCH GROUNDI THE GREEN CLIP
IS NOT USED.
3_
4.
Turn the vehicle's Ignition Switch (key) to the "ON" or "RUN" position only.
Do not start the engine.
Read the analyzer's voltmeter.
Normal readings should be as follows:
Breaker Point Systems: At or slightly below battery voltage (12 volts) if the points are open.
Approximately 6 to 8 volts if the points are closed, "Jog" the engine quickly to close the points if they are open.
The meter reading will be significantly lower with the points closed as shown above.
If the Voltmeter stays at or very close to battery volts (12 volts) with the points closed, a problem exists in one or more of the following areas:
Ignition coll primary open, Pigtail from negative (-) or Distributor
(Dist) side of co11 to distributor open, points defective, or open ground within the Distributor.
If the Voltmeter stays at.zero (no reading), a problem exists in the
supply circuit to the ignltion Coil i.e. ballast resistor open (when
equipped), ignition switch or related wiring open.
Electronic Ignitions: At or slightly below Battery Voltage (12 volts)
If the voltage is not as specified, see the proper diagnostic procedures relating to your vehicle ignition type as shown later in this manual.
Your vehicle service manual is also a valuable toot in diagnosing
Electronic Ignition problems.
Page 1_
Page 20
Test Number 12--Breaker Point Resistance
NOTE; This test does not apply to Electronic ignition systems.
NOTE: Remove the distributor cap before testing and inspect the contact points.
If they are blued, blackened, or noticeably pitted, they should be replaced.
Normal, used contact points are light gray In color.
i.
Place the Function Selector Switch in the POINTS position.
,
Z.
Disable engine to prevent starting by removing coil secondary lead from distributor and connect to a good engine ground with Jumper lead as illustrated below.
#
3.
Have an assistant turn the ignition switch to the START position momentarily to crank engine slowly a little at a time until the points are closed as indicated by the lowest meter reading.
4.
Points are in GOOD condition if the reading is .3 volts or less.
Replace points if the reading is out of the good zone, or over .3 volts.
5.
If the reading still exceeds .3 volts, check the distributor ground plate, (plate on which points are mounted), pigtail extension to primary lead inside distributor or primary lead to coil for breaks, or misaligned point contacts on points.
Refer to your vehicle service manual for other tests relating to the Breaker Point Circuit.
6.
When new points are installed, always clean and lubricate cam, check again for contact alignment, and resistance, Adjust to correct Dwell before startlng--See Test Number I 3, Dwell Adjustment.
7.
Correct the defect and repeat the test.
When the points check OK, turn the ignition switch OFF.
Reinstall the high tension lead in the center of the distributor cap.
FIGURE 21
SECONDARY COIL CONNECTIONS
TO PREVENT ENGINE STARTING
BLACK
CLIP
TO GROUND
ON ENGINE
GREEN
CLIP
DIST.
PRIMARY LEAD
GROUND
ON
ENGINE
T.estNumber 13--Dwell Adjustment--Breaker Point S#s##m.s
1.
Rotate the Function Selector Switch to the dwell position.
2.
Consult your vehicle service manual to determine which vacuum hoses, if any, should be disconnected and plugged prior to making dwell adjustment or test.
3.
Run the engine at specified idle speed and note dwell reading on proper
4-6 or 8-cylinder scale to correspond to the engine under test.
4.
Compare results to vehicle specifications_ adjust _o correct dwell if required.
Page 21
READ PROPERSCALE TO SUIT
NUMBER OF ENGINE CYLINDERS
RED J
CLIP
BLACK
CLIP
_J
BAT,+
COIL _
GREEN
CLIP
DIST.
DISTRIBUTOR
FIGURE 22
DWELL ADJUSTMENT CONNECTIONS
On engines that have a sliding window in the distributor cap, adjust dwell as follows:
I.
Operate engine at specified idle.
2.
Raise the window and insert a I/8" Allen wrench into the adjustment screw.
3.
Turn the adjustment screw until the correct dwell is indicated on the dwell scale.
Page Z2
NOTE:
Disconnect omd plug the vacuum advance llne from the disfr;butor.
If the vehicle is equipped with an advance-retard solet_o;d, disconnecf the wire at the carburetor end,
WINDOW
1/8" ALLEN
WRENCH
Locking
ADJUSTMENT
SCREW
GM TYPE
PLUG END OF VACUUM LINE
FIGURE 23 FIGURE 24
On engines with non-window distributors, adjust the dweil as follows:
I.
Stop the engine and remove €o11 wire from the center tower of distributor cap.
Connect the jumper wire between coll wire and engine ground to prevent arcing while cranking the engine,
2.
Remove the distributor cap and rotor.
3.
Connect a remote starter switch to the vehicle or have an assistant crank the engine for you with the ignition switch.
4.
Turn the ignition switch on and with the engine_cranking, observe the reading on the dwell scale.
5.
To adjust dwell, loosen LOCKING screw slightly and adjust point gap by turning ADJUSTMENT screw (Figure 25) or by inserting a screwdriver in slotted hole (Figure 26 ) and turning the tool slightly left or right to obtain the specified point dwell reading.
Tighten locking screw and recheck dwell while cranking engine.
Repeat procedure if necessary.
6.
Reassemble distributor and recheck dwell reading with engine operating at specified idle.
.....................................
II1[[I III I[111['1[11
Breaker Po(nf
P
Ga_
Slotted Hole
Lock|ng Screw
FIGURE 25
TYPICAL
INTERNAL
TYPE
BREAKER
ADJUS TMENTS
FIGURE 26
Page 23
NOTE; It is important to recheck the ignition timing every time the dwell is adjusted.
A one degree change in dwell causes a one degree change in timing.
THIS TEST DOES NOT APPLY TO ELECTRONIC OR TRANSISTOR IGNITION SYSTEMS EXCEPT
DELCO HEI AND THOSE TYPES USING CONVENTIONAL CONTACT POINTS.
ON HE1
SYSTEMS, THE DWELL ANGLE WILL BE LOW AT iDLE SPEED AND WILL INCREASE STEADILY
AS ENGINE SPEED INCREASES.
IF IT DOES NOT, THE ENGINEMAY MISFIRE DURING
ACCELERATION AND AT HIGH SPEEDS.
TO CORRECT THIS CONDITION, REPLAC_ THE
ELECTRONIC MODULE IN THE DISTRIBUTOR,
There is a direct relationship between dwell and timing.
However, it is only a one way relationship.
If you change the dwell angle of the breaker points, you will automatically change the timing of the ignition.
Changing the timing, however, has no effect on the dwell angle.
FOR THIS REASON IT
IS IMPORTANT TO RE-CHECK THE TIMING WHEVEVER THE DWELL ANGLE HAS BEEN ADJUSTED.
When the dwell angle is increased, the timing is retarded.
Conversely, when the dwell angle is decreased, the timing is advanced.
In fact, there is a one-to-one ratio between dwell and timing.
For every one degree change in
dwell, there is a corresponding one degree change in timing.
This can
sometimes be used to make minor changes in timing.
If, for example, it is desired to advance the timing two degrees, it canbe done by reducing the dwell angle two degrees. This assumes that the dwell angle will not be changed out of its specified range.
Due to normal wear of the rubbing bloc_ the normal tendency Is for the dwell angle to increase.
This, of course, causes the _iming to become retarded and results in a loss of power and econorRy, if the engine has been properly tuned initially, restoring the dwell angle to its original setting will restore the timing to its original setting.
I /
//
'w°°
W;de Gap
_o 49. _
Small Gap
_ /
TYPICAL DWELL
8 CYL, ENGINE
SMALL DWELL ANGLE
CAUSES POOR HIGH SPEED
PERFORMANCE
FIGURE 27
LARGE DWELL ANGLE
CAUSES POINTS TO BURN
T_estNumbeF !4-_DwelI Variation Test
Repeat Test Number 13, Steps i-4
NOTE: This test does not apply to transistorized ignition systems (except those types using conventional contact points).
I.
Rotate the Function Selector Switch to the DWELL position.
2.
Disconnect and plug vacuum advance hose(s) as described in DWELL
Angle Test 13 on page 21 and 2_
3.
Operate engine at curb idle. ,,,lie observing DWELL scale for any change in reading, increase engine speed to approximately 1500 RPM and then return to idle.
4.
Reconnect vacuum advance hose(s).
8(
0
5
I0
15 2O 25 3O
35
40
,45
FIGURE 28
DWELL VARIATION
Variation on 4, 6, and 8=cylinder engines should not exceed 3 degrees.
if it does, check for: a.
wear in distributor shaft b.
wear in distributor shaft bushing c.
wear in breaker plate
NOTE: Manufacturer's specifications for some engines call for the distributor vacuum advance hose to remain connected during the Dwell
Variation Test.
In this case, a maximum dwell variation of 6 degrees is allowed unless otherwise specified by the manufacturer.
Test Number IS--Dwell Anqle--Electronic!gn!t!qnSystems
(Electronic Solid State or Transistor Ignition Systems)
General--
Due to the vast array of electronic ignition and engine control systems being used on late model cars, it is essential that specific service information for the vehicle under test be obtained.
Although Dwell
Angle is not adjustable on electronic systems, the reading obtained is important and should be within the manufacturer's speclfled limits.
If it is not, consult the manufacturer's shop manuals for diagnostic procedures,
Preparation for tests--
Before beginning tests, always check the zero adjustment of the instrument as outlined under Description--Zero Adjuster, above.
Attach the test leads to the instrument and proceed to the section in this manual describing,
CONNECTIONS FOR TESTING the appropriate vehicle.
CONNECTIONS FOR TESTING
Ford--
On Ford cars with 1974 electronic ignition systems, use the Ford adapter pin as shown in Figure29, below.
Connect the GREEN clip from the Craftsman
Engine Analyzer to the adapter pin.
Connect the RED cllp to the positive battery terminal and the BLACK clip to a clean and secure ground such as the engine block.
TO IGN.
SWITCH
TO DIST.
FORD
ADAPTER
DWELL CONNECTION TO
1974 FORD ELECTRONIC
IGNITION SYSTEM
FIGURE 29
On Ford cars with insulated call term(neis, lift the dls- trlbutor terminal and slide the
Ford Adapter €lip in place as shown, then push the terminal dawn on it.
Remove when the
tests are finished.
vage Zb
On 1975 and later Ford electronic ignition systems, connect the GREEN cllp from the Craftsman Engine Analyzer to the wire terminal on the TACH side of the coll as shown in FIGURE 3_ below.
Connect the RED clip to the positive battery terminal and the BLACK cllp to a clean and secure ground such as the engine block,
GREEN
DWELL CONNECTION TO i975 AND LATER FORD
ELECTRONIC IGNITION
SYSTEMS
FIGURE 30
On General Motors cars equipped with an ENGINE ELECTRICAL DIAGNOSTIC
CONNECTOR (usually located under the hood near the left front fender wheel well), open the hinged cover and insert the spade terminal adapter in socket number 6, as shown in Figure31, below.
Connect the GREEN clip from the Craftsman Engine Analyzer to the spade teHminal adapter Just installed, Connect the RED cllp to the posltive battery terminal and the
BLACK cllp to a clean and secure ground such as the engine block.
NOTE: Experience has shown that this is the easiest way to make a dwell
connection to GM vehicles.
Only if your vehicle does not have an ENGINE
ELECTRICAL DIAGNOSTIC CONNECTOR should you use one of the two (2) connection procedures to follow.
CAUTION: Do not confuse the ENGINE ELECTRICAL DIAGNOSTIC CONNECTOR with the HEATER/AIR CONDITIONING DIAGNOSTIC CONNECTOR located on the passenger side of the vehicle near the air conditioning system.
DWELL CONNECTION TO
GENERAL MOTORS CARS
WITH DELCO HEI AND
DIAGNOSTIC CONNECTOR,
FIGURE 31
ELECTRICAL
DIAGNOSTIC
CONNECTOR
TERMINAL
ELECTRICAL
DIAGNOSTIC
CONNECTOR
Page 27
General Motors--
On General Motors cars with 4-cylinder and in-line 6-cylinder engines and separate ignition coil, connect the GREEN clip from the Craftsman
Engine Analyzer to the open TACH terminal as shown in FIGURE 32, below.
Connect the RED clip to the positive battery terminal and the BLACK clip to a clean and secure ground, such as the engine block.
CONNECT GREEN CLIP
TO THIS TERMINAL
DWELL CONNECTION
TO GENERAL MOTORS
CARS WITH SEPAPJ_TE
IGNITION COIL
FIGURE 32
On the General Motors integral ignition coil, V-8 and V-6 HEI systems,
slide the adapter onto the TACH terminal as shown in Flgure 33 below.
Connect the GREEN clip from the Craftsman Engine Analyzer to the adapter just installed.
Connect the RED cllp to the positive battery termlnal and the BLACK clip to a clean and secure ground such as the engine block.
DWELL CONNECTION
TO GENERAL MOTORS
CARS WITH DELCO
HEi IGNITION SYSTEMS
FIGURE 33
ADA
Page 28
Ford / Chrysler / American Motors i.
Connect the test leads from the Craftsman Engine Analyzer as shown in Figure 29or 30 as appropriate to the vehicle under test.
Keep the leads clear of fan, belts, and pulleys.
2.
Set the Function Selector Switch to the DWELL position.
3.
Start the engine and let it warm to curb Id]e speed (check manufacturer's recommendations).
4.
Read the appropriate 4, 6, or 8 cylinder DWELL scale, depending upon the engine type.
5.
The DWELL reading obtained should meet the manufacturer's specification for that engine.
If it does not, consult the manufacturer's shop manuals for diagnostic procedures.
General Motors
I.
Connect the test leads from the Craftsman Engine Analyzer as shown in Figure 31_32, or33 as appropriate to the vehicle under test.
Keep the leads clear of fan, belts, and pulleys.
2.
Continue with steps g through 5 as described under Ford / Chrysler /
American Motors, above.
3.
On HEI systems, the indicated DWELL Angle wlll normally be low at idle speed and wil_ increase steadily as engine speed increases. If it does not, consult the manufacturer's shop manuals for diagnostic procedures.
, use _
TestNumberi6--initia] ignition Timing
This test should be made following any dwell adjustments as the point setting controls the basic ignition timing.
On electronic ignition systems refer to the vehicle service manual for special instruction_.
Spark timing controls are used to advance or retard timing.
Follow manufacturer's service procedures to check & adjust timing properly.
I.
Connect a timing light to the battery and #i spark plug cable as_illustrated below, in Fiqure 38.
2.
Rotate the Function Selector Switch to the RPM position and set the RPM range selector to the Lo-1200 RPM position for idle speeds and the Hi-6000
RPM for the high speed tests.
3.
Locate the timing mark on the fly wheel and degree indicator plate.
Clean both surfaces and apply a white chalkmark on the fly wheel mark for good vlsibility.(Figure 35)
4.
Consult your vehicie service manual or tune-up decal under the hood to determine which, if any vacuum hoses must be removed for proper timing adjustment.
Make sure to follow all timing instructions pertaining to your vehicle.
The above illustration shows the vacuum advance hose disconnected and plugged.(Figure 37)
5.
Close starter shunt, start the engine and operate at specified engine speed.
Refer to vehicle tune up specifications label under the hood for proper RPM.
6.
Operate timing light and aim it at the timing mark.
Note the position of the fly wheel mark in relation to the degree indicator.
Compare to specified initial timing.
If not within specifications, readjust distributor as required,
7.
TIMING ADJUSTMENT.
To change timing, loosen the d_stributor hold down
screw or bolt and rotate the distributor body as shown in Figures
36 and 37. until proper timing is indicated.
Test Number 17--TimingAdyanceSystems
NOTE: The following centrifugal and vacuum advance tests are general ones and may not apply to many of.the more modern vehicles.
Many of today's vehicles have complex emission and ignition control systems which may alter or prevent spark advance from taking place under various conditions. It is therefore very important to consult your vehicle service manual for the proper procedures to check and/or repair advance systems.
Ao
Mechanical
CENTRIFUGAL ADVANCE.
With the distributor vacuum hose disconnected and plugged, operate the engine at specified idle speed and note position of timing mark.
INCREASE engine RPM slowly and observe movement of timing mark.
The mark should move steadily and without jerking in the opposite direction tO fly wheel rotation, up to approximately 1800 RPM.
Decrease
speed and mark should return smoothly to its original position.
VACUUM ADVANCE TEST.
Operate the engine at 1500 RPM and connect the vacuum advance hose to the distributor vacuum control and observe movement of the timing mark.
The mark should move opposite to fly wheel rotation and may appear beyond the range of the degree indicator with a normal operating vacuum control.
BATTERY POST ADAPTER CONN-
ECTIONS FOR STARTING ENGINE
FIGURE 37
Hold down
screw or bolt
ROTATION
FIGURE 34
..............................
' ...................
II1[I fl[ [[[[ [[[[I I J[lll rr i rrrlll
ROTATION'\II 1[Ii_"_
..........
FIGURE 35
, .......................................................
Rotor
Rotation
11111111 hill
Rotor
Rotation
I[IH[ I1 ifll[i[lllll
SEE PAGES 6 AND 7 FOR
PROPER HOOK-UP FOR
RPM
NO.I
SPARK
PLUG
Advance
FIGURE 36
Retard Advance
FIGURE 38
Vehicle
Battery
Tester
PlckuI
rage _
RECONNECT FOR VACUUM
ADVANCE TEST
FIGURE 39
Bu
Electronic
Many of today's modern vehicles use sophisticated computer controlled spark advance systems.
Your Craftsman Analyzer, a top quality timing light such as the Sears 213400 Timing Light or 219400 Advance Timing
Light, and the vehicle service manual are essentialitools for accurately checking these complex advance systems.
IMPORTANT: DO NOT ATTEMPT TO SERVICE THESE ELECTRONIC ENGINE SYSTEMS
WITHOUT THE VEHICLE SERIVCE MANUAL.
Some of the Systems currently in use are:
Chrysler Corporation
Ford Motor Company:
General Motors:
ELB (Electronic Lean Burn) introduced in 1976, Re-named ESA (Electronic
Spark Advance) in 1979.
EEC I, EEC II, EEC 111, (Electronic
Engine Control) introduced in 1977.
ESS (Electronic Spark Selection) introduced in 1977.
EST (Electronic Spark Timing)
ESC (Electronic Spark Control)
C-4 (Computer Controlled Catalytic
Converter)
C-3 (Computer Conmland Control)
Page 3Z
Test Number IB--Carburetor Adjustmentr-M_xture (Atr_Fue!_Ratia_
I.
Rotate the Function Selector Switch to the RPM position.
Slide the
Range switch to the L0-1200 RPM position for idle speed tests.
2.
EMISSION CONTROL SYSTEMS, Carburetors on late-model vehicles usually have sealing caps on idle mixture screws which prohibit or restrict carburetor adjustment.
These are factory calibration seals.
Refer to vehicle manufacturer's service manual for mixture screw adjustment procedures.
3.
IDLE MIXTURE ADJUSTMENT.
It is adviseable whenever possible to use the mixture adjustment procedure as outlined in the manufacturer's service manual.
The following procedure should work well, however, on those vehicles without emission control systems.
Turn the idle mixture screw in (lean) until the idle RPM starts to decrease and the engine begins to idle roughly.
When this point is reached slowly back the idle mixture screw out (rich) until the maximum steady RPM is obtained.
When making any mixture adjustment only turn the mixture screw i/8 of a turn at a time.
Between adjustments allow about 30 seconds for the engine speed to stabilize.(Figuro 40)
4.
MULTI-BARREL CARBURETORS, Repeat procedure described in Test Number
3 on EACH mixture screw until the smoothest maximum RPM is obtained.
Turn each screw i/8 of a turn at a time to prevent engine stalling.
If the final idle RPM is now higher than specified, readjust mixture screws again until no further increase is possible.(Figure 4))
5.
NOTE: On vehicles with emission control systems, air injection pumps and positive crankcase ventilation, refer to vehicle tune-up decal in the engine compartment for idle adjustment procedures.
IMPORTANT!
Air/Fuel mixture adjustment is one of the more critical adjustments on the engine, Fuel economy and Emission Control can be diminished through incorrect settings or adjustment, Carefully follow the vehicle manufacturer's instructions when adjusting carburetor idle mixture.
TYPICAL,SINGLE
AND MULTIPLE BARREL
CARBURETORS
Curb Idle Speed
Adjustment
Idle
_ixture
Screws
FIGURE 40
Idle
Mixture
Screw Anti-Dieseling Solenoid
FIGURE 41
T_},t Number_!9--CarburetorAdjustment--Curb idle Speed
2.
Rotate the Function Selector Switch to the RPM position.
Slide the
Range Switch to the L0-1200 RPM position for idle speed tests.
IDLE SPEED ADJUSTMENT.
Engine must be at normal operating temperature before setting curb idle.
Refer to vehicle specifications for idle
RPM range. Check for variations in curb idle with air conditioner on, and any other specified idle range requirements.
Curb idle speed can be affected by other engine adjustments such as timing, air/fuel ratio, and emission control operation.
Carefully follow manufacturer's instructions when adjusting curb Idle.
Be certain to recheck it after making any other engine adjustments.
Aw
8_
Anti-Dleseling Solenoid Adjustment
The purpose of this device is to prevent engine run-on (dieseling) after the key is turned off.
Basic operation of this solenoid is as follows:
When the ignition key is in the run position, voltage is applied to the solenoid, energizing it and causing it to move the idle position of the throttle.
Curb Idle is adjusted with the solenoid energized.
When the key is turned off the solenoid retracts and allows the throttleplates to close or return to a base idle, hence, sh_tting off the fuelialr supply to the engine.
By using the RPM, VOLTS, and OHMMETER sections of your Craftsman Analyzer and specific tests described in your vehicle service manual, you will be able to diagnose faults and properly adjust the antl-dleseling solenoid.
Air-Conditionlng Solenoid Adjustment
The purpose of the Air Conditioning solenoid is to maintain proper engine idle speed with the vehicle's air conditioner running.
It is energized by the same circuit as the Air-Conditioning clutch and when energized "kicks" the throttle enough to bring the idle to its intended curb idle speed, By using the RPM, VOLTS, and OHMMETER sections of your Craftsman Analyzer and specific tests described in your vehicle service manual, you will be able to diagnose faults and properly adjust the air-conditioning solenoid.
Pege 33
Page 34
Test Number 21 and 22-_Fast !dle and Automatic Choke Adjustment
The purpose of the fast idle function is to maintain proper engine
speed during cold engine and warm-up operation.
Additional throttle
opening is needed with the automatic choke butterfly valve in a closed or partially closed position to keep the engine running smoothly and prevent stalling.
The choking action provides a richer fuel-air mixture during cold engine operation to compensate for poor fuel_atomization.
The increased idle speed warms up the engine quickly which enhances fuel-air atomization and mixing.
The fast idle adjustment screw seats on a cam which is thermostatically controlled through the choke linkage.
As the engine warms, the choke opens, the fast Idle cam drops to progressively lower steps and the fast idle speed gradually approaches curb-idle. On a fully-warmed engine, the fast idle cam releases the fast idle adjustment screw completely. Engine
Idle speed is then controlled by the curb idle adjustment screw.
Fast idle adjustment procedures differ among the various automobiles.
Consult your specific vehicle service manual for proper procedures.
It may be necessary to bypass one or more spark timing or emissions system
controls, either vacuum or electric, while adjusting the fast idle.
Many late model vehicles use a full electric or an electrically assisted choke. It contains a small electric heater which activates a bimetallic coil spring or belleviile washer to reduce the choke time under certain conditions. This heater may be controlled by a temperature
switch located either in the choke housing or elsewhereion the engine.
The Ohmmeter Function can be used to confirm switch continuity, heater element resistance and related wiring.
The Voltmeter function is used to confirm the presence of voltage to and within the choke system as directed by your vehicle service manual.
Use the RPM function to set fast Idle per manufacturer's instructions.
Test Number 23--Ignition Coil
Refer to Test Number 9--OhmsTest (sections I-7) for Ohmmeter use.
IGNITION COIL PRIMARY RESISTANCE TEST
I.
Set the Range Slide Switch to the OHMS X I position.
2.
Remove the primary wires from both coil terminals.
3.
Connect the RED and BLACK test leads to primary coil terminals, as illustrated in Figure 42.
4.
Observe reading on the Low Ohms scale, then re-connect primary wires.
D=._
35
BLACK
Ao
B4
FIGURE 42
PRIMARY RESISTANCE
TEST CONNECTIONS
The reading should meet the vehicle manufacturer's specifications
Generally, the coil primary winding resistance should be between I and
2 ohms. Check your vehicle service manual for the exact value.
if the reading is substantially above or below the manufacturer's specifications, the ignition coil is defective and should be replaced.
FIGURE43
I.
Remove the high tension lead from the coil tower, Be sure the ignition switch is OFF.
2, Connect one of the OHMMETER test leads to either coil screw terminal.
(On late model Ford cars, use the Ford Adapter as illustrated on page 25.)
Connect the other lead to a spark plug adapter and insert in the coil tower as shown,
3.
Read the Ohms X 1000 scale on the meter and compare the reading with the manufacturer's specification in the next column.
TEST RESULTS
The resistance of most coils for standard ignition systems are given in the table below,
_NUFACTUREB
American Motors
6,500 to 9,500
g,Bo0 to 11,500 Chrysler
Ford
7,500 to 9,000
5,500 to g,500
G. M. Delco Remy
If the reading is higher or lower than the manufacturer's specification, the coil should be replaced.
Test Number 24--Ignition Cables
Refer to Test Number 9--OhmsTest (sections 1-7) for Ohmmeter use.
IGNITION CABLE TEST
Standard ignition cable is NOT solid wire.
It is a graphite impregnated fibre conductor with a built-in resistance of 1000 to 50,000 ohms, depending upon the length of the cable and the type of _ngine.
This resistance is necessary to suppress spark interference with radio, television, and other communication reception.
It also contributes to longer distributor cap and spark plug electrode life.
If the resistance value of the cable is significantly increased by stretching or breaking the internal graphite impregnated conductor, the engine will misfire and its overall performance will deteriorate.
I.
Remove the cables from the engine.
When removing the wire from the spark plug, grasp the spark plug boot and twist and pull wire with a firm, steady force.
DO NOT yank on the cable to remove it.
2.
Use the X 1000 position on the RANGE SELECTOR of the Craftsman
Analyzer.
3.
Connect the RED and BLACK Ohn=netertest leads to the ends of the cable as shown below, and use an adaptor spring at the SPARK PLUG END of the cable as shown.(Figure 44_
4.
Gently flex the ignition cable while testing, if the OHMMETER reading wanders excessively or rises to infinity (,o) thelcable is defective and should be replaced.
5.
Consult your vehicle service manual for the proper resistance range per inch or foot of cable.
Replace those wires which are out of tolerance.
ADAPTER SPRING,
DISTRIBUTOR END
BLACK
SPARK PLUG END
IGNITION CABLE
TEST CONNECTIONS
FIGURE 44
'RED rdge Jl
Page38
Refer to Test Number 9--Ohms Test (sections 1-7) for Ohmmeter use.
The purpose of the ballast resistor (when equipped) is to limit the current available to the ignition coil when the vehicle is running.
Failure of this resistor results in a dead engine.
If the engine trys to start when cranking, but the instant you release the key,it stops, then you may have an "open" ballast resistor.
You can feel and hear the engine cranking speed increase because the ignition system is trying to take over.
With the ignition key off, locate the ballast resistor and remove the wires that are connected to it.
(The ballast resistor is usually a white ceramic block with brass terminals and is generally located on the fire wall.
If you have difficulty locating it, consult your vehicle service manual.)
NOTE: Many Chrysler Corporation Electronic Ignition systems use a dual ballast resistor, One side of this resistor functions exactly as indicated above.
The other side is the auxiliary ballast resistor and it should read approximately 5 ohms.(Figure 45)
PROCEDURE
The OHMS scale is used to test the ballast resistor.
To test the ballast resistor, disconnect all leads at their terminals to pr@vent possible damage to the analyzer or to prevent inadverdent measurement of other circuits
connected to it.
CONNECTIONS:
Ii
2.
Insert the white plug OHMS lead into the corresponding tester socket,
Connect the RED and BLACK clips to the ballast resistor as shown.
Some ballast resistors are dual units--such as on some Chrysler automobiles, while others are single units--or resistor wires.
Some ignition systems utilize the ballast resistor in the coil primary (see ignition coil test).
TEST PROCEDURE: i.
The Ohmmeter will read full scale at the extreme right hand side,
INFINITY ( Oo ), with the BLACK and RED clips disconnected.
When the clips are connected together, the meter pointer will read zero on the left (short circuit or zero ohms).
2.
To measure the ballast resistor, connect the RED and BLACK clips as shown in Fi_ure 45 .
Set the Function Selector Switch to the OHMS position.
3.
Set the Range Selector Switch to the LOW scale.
Typical readings should be between 0.5 and 7.5 ohms.
IMPORTANT: Consult your vehicle service manual for the exact OHMS value for your car.
The value read should be very close to the specified value as large differences can cause damaged points or electronic ignition module
(when too low).
4.
If the meter reads _ , (right hand side of the scale) the ballast resistor is open and must be replaced.
BLACK
CHRYSLER _,REGU LAR
BALLAST --
.5
TO .6
,_ OHMS
OHMS "--I
BALLAST RESISTOR TEST CONNECTIONS
FIGURE 45
Test Number 26--lqnition Switch
The ignition switch performs many duties beyond starting the vehicle.
With the guidance of your vehicle service manual, your Craftsman Voltmeter and/or
Ohmmeter can confirm operation of the ignition switch,
Some of the ignition switch functions are as follows: i.
Activate starter relay (start position)
2.
Bypass ignition ballast resistor (start position)
3, Confirm tell-tale cluster lights (start position)
4.
Activate ignition
5.
Activate accessories
If you have difficulty with any of the above circuits, the ignition switch is a possible source of trouble.
Consult your vehicle service manual for exact diagnostic procedures.
Hage ._J
Page 40
ELECTRONIC IGNITION SYSTEMS
The following ten pages are devoted to the four basic Electronic Ignition
Systems as used by American Motors, Chrysler Corporation, Ford Motor Company, and General Motors,
The diagrams and charts will step you through point-to-point testing of the various components within each system.
You will use the VOLTS, OHMS and
POINTS-LOW VOLTS positions of your analyzer.
It would be advlseable before beginning these tests to review the use of the VOLTS, OHMS, and POINTS positions of your analyzer as shown earlier in this manual.
American Motors 1975-76
American Motors 1977 & Up See Ford Motor Co.
Chrysler Corporation
Ford Motor Company
General Motors (integral Coil)
General Motors (External Coil
)
Test Number 27--Amerlcan Motors Electronic igni_tl.pn..._.Sys.tem
Test Number 2g--Ford Electronic igD_ItlonSy_s.tem
Test Number 30--Delco HEI ignition
Page 41
GENERAL MOTORS HIGH ENERGY IGNITION-DISABLING PROCEDURES
When performing Charging System teals on General Motors vehicles equipped with
High Energy Ignition (HEt), the engine can be prevented from starling as follows:
........
i II .,r r, ,, , .,,i,rbl Ir I, , ,, J,im.,.I,,,, ,,,, ,,,,,,,,,
SYSTEMS WITH COIL IN DISTRIBUTOR CAP
Disconnect primary wire from the BAT
terminal on the distributor cap,
CAUTION: The tachometer terminal must
NEVER be connected to ground at the
distributor cap, as damage to the
distributor module can result.
_r _'_--_ ' _,_"€_,. PRIMARY
SYSTEMS WITH SEPARATE COIL
Remove high,tension coll wire from colt secondary terminal, Connect Jumper Wire between coil secondary terminal and a good ground on the engine.
LI]_ IL IILILI[_II LJLI l ..........
_I I IILIIIIIILIi .......................................................
HEI WITH ELECTRICAL
DIAGNOSTIC CONNECTOR
Insert the GM Diagnostic Connector
Terminal in terminal No, 6 of Electrical
Diagnostic Connector, Connect jumper wire
between this terminal and a good ground,
CAUTION: The tachometer terminal must
NEVER be conneoted to ground at the
distributor cap, as damage to the
distributor module can result.
.........................................................
JUMPER'
WIRE
DIAGNOSTIC
L
CONNECTOR
G
ELECTRICAL
DIAGNOSTIC
CONNECTOR
TERMINAL
ENGINE
GROUND
Page 42
IGNITION
SWITCH
POS,-,,_
COIL -
TERMINAL
HIGH TENSION
ITPUT TERMINAL
COIL
TERMINAL
COIL
GROUND
ELECTRONIC
MODt LE
BLACK
NEG4 POS
GROUND
12 VOLT
BATTERY
DISTRIBUTOR
DISTRIBUTOR
SENSOR UNIT
DISTRIBUTOR
CONNECTOR
FIGURE 46
AMERICAN MOTORS ELECTRONIC IGNITION SYSTEM
Number 27 Continued
AMERICAN MOTORS ELECTRONIC IGNITION COMPONENTS
TESt
A Battery State of Charge
S[LECTOR
KNOB
POSITION
16 VOLTS
_,s ¸ - =±, ,,111 ..........................
:........................................
C LIP
CONNECTIONS
RED j BLACK
J
2
Battery
Pos.
(+)
1
Batte,y
Neg.(-) firST
AND
PROCEDURE
RESULTS
Remove Coil High Tension W_re from the distributor and ground _t.
Crank Engine.
Meter should read above 9.0
rafts, If not_ charge battery and repeat test. Replace
H|gh Tension Wire lt_ dlstr_butor.
B fgnltio_ Switch
C Call Primo_y and Electronic
Module
...................................
:
D Colt Pdmory
Reslst_nce
16 VOLTS
16 VOLTS
_ .-o= ...........................
OHMS
X [
3
Coil
Poi,(*)
....Termlnal
4
Call
Ne0.(-)
Terminal
. ...............
= :
3
Coll
Pro, (÷)
Terminal
!
flattery
Neg,(_)
I flattery
Neg.
(-)
4
Coil
Neg.
(-)
Terminal
Wffh Ignition Switch on, meter should read _t least |0 vain, tf not_ inspect the sw_tch fm lame connections and faulty €onfiders, Replace switch if defective,
Unplug dlstHbutot connector.
With Ignition Switch on, meter should read between 5 o_d 8 volts, If OK proceed
tO Test F, if less thor_ 5 Volt: or more than 8 vohst pro- ceed wt_ ?elf
O,
WIth distributor connector unplugged and call negotlve lead dIsconnected, meter should read between .7and
2.5 €;_ms with Ign;t;o_ Switch ofF.
if not, _eploce €o;t,
E Coil Secondary
Retlstdnce
OHMS x IOO0
3
Coil
P_.
(÷)
Terminal
5
Coil hlgh tension output
Teetotal
F Distt{butor Semor
Unit ContinuHy
OHMS
x |
G Distributor Set_,_or
U_It to Grou_',d
OHMS x 1000
8
DistHbuta¢
Connector
Cavity i l|ottery
Neg. (-)
9
Distributor
Co..ecto_
Pin
9
Oisttlbuto¢
Cermet tot
Pin
With ign_Hon Switch off, and negative (-) call lead dis- connected, connect RED Clip tO positive (÷) Ct>;I ferminal_ and hold BLACK cllp in coil h_gh ten_ion output terminal.
Meter should read betwqlren B,000 and 16,000 ohms.
if not,, repJoce €oli.
Meter should read between ,8 and 3.0 ohms. if not, replace Di:trlbuto_ Se_s_ Uait.
Meter should not move.
ff it does, replace Distrlbuto_
Sensor Unit.
Page 43
If tests above do not locate defective components, then the trouble is wlth the Electro, to Control Unit.
Since this unit is not serv{ceob|e, _t must be replaced.
Page 44
ELECTRONIC
CONTROL UNIT
GROUND
NEG
POS
IGNITION
SWITCH
I2
V, BATTERY
COMP.
RESISTOR
SIDE
NOTE LOCATION
:H
DUAL
BALL._ST
AUXI LIARY
RESISTOR SIDE
COIL
ISTRIB!.
CONNECTOR
DISTRIBUTOR
CHRYSLER ELECTRONIC IGNITION SYSTEM
FIGURE 47
CHRYSLER ELECTRONIC IGNITION COMPONENTS
I
TEST
A Battery StcJ_'e of Charge
B Compensofing
51de of Baflatt
C Col! Primary and Electroni€
Control Unit
D Coil Primary
O Balt_t
Rei;stanCe
Auxiliary Side
H Pick-up Call to Ground
SELECTOR
KNOB
PQS_TION
16 VOLTS t6 VOLTS
POINTS
See
Note f 1
OHMS xl
E Colt Secondary
Co_tinuity
..............................................................................
F Baltost
Rot;trance
Camp.
Side
OHMS
x i000
OHMS
X i
OHMS
X 1
OHMS
1000
CLIP CONNECTIONS
R{O J BLACK
2
Battery
P_.(*)
5
Coil
PUS.
Terminat
6
Call
NEG,
Termir_l
?
8ah'et-y
Neg.(_)
I
Buttery
Nee, (-)
1
Ektttery
Nee, (-)
5
Colt
POS,
Termini
Call
POS,
TermIrtoJ j,i,
9
BaUost
Term _naI
(Camp. S;de)
4
Batiast
Terminal
(Aux..Side)
8
O;stributor
Connecto_
Pin
7
Distributor
ConneCtor
Cavity
6
Coil
NEG.
Terminal
12
Cull
To_er
Contact
Ballast
Term lno I
(C_p,Side)
3
Ba!last
Termlnal
(Aux_Side)
1
Battery
Neg.
(-) i3
Distributor
C_ffectot
Pin
TEST
AND
PROCEOURE
RESULTS
RemQve the High Tet_slor_ Wire from the dls.ttibutor and grouttd it.
Crank Engine, The meter should read at iea_t
9 ruffs while cranking.
If les_, cNarge the buttery and
pcoceed tO Test B.
With ignlfion Switch on and engine not ruHnlng, meter should read 3,5 to 7,5 v,oltt, If le_s than 3.5 or xero proceed to Test E.
tf above 7.5 volts, proceed to Test C,
If OK_ crank ettgtne,-Vohage should feud of lent 9.
If not_ It_ct tach.
igntt;o_
Replace high
Sw;tch for bad con_ecttons tension wlre.
or con-
W_th Ignition Switch on and englne not rumntng, meter should read between 0.3
and 1,8 volts, if less than 0.3
p_oceed with T_st O.
IF OK, proceed wlth Test F.
if
h|gher tha_ 1,8_lnspe_:t wffes a_d connection at Elecffonic
Control Unlt, if wlres und contractions OK of Electroni€
Control Unit, perform Test K_ If test OK_ repface Electrori_ COntrOl Unit.
With Ignlttom Switch off, meter _hould read one to three ohms.
If it duel
proceed tO E, '_ riot, replace Ignition Coll, If OK,
Remove hlgh teri, to_ teod from call tower.
Connect
BLACK e,ltp to t_er contact, With Igmition off, meter sl_JId read 5,000 to 25_000 ohms.
l| it does not, re- place coil,
.on.......................
.........
cot_t_ected to Terminoh 9 and t0 on Ba!last_
meter _hauld read 0,2 t_ 1.5 ohms.
if it does _Ot, replace Ba!lc_st.
Remove both Slip-on Termir_t_ from Ballast a.d
with
clips ©orinected to teemlr_ls 4 and 3 on Ballast, meter
should read between 3 to 7 ohms, If It daes not, re-
place Ballolt_ reconnect Slip-on Termlrm!_ at Ballast.
Disconnect dlstttbuto_ conriecto_.
movement, to Test J,
Metes should show no
If It do_s, replace Pick-up Cot1.
Proceed
K
J Pick-up
Contlnu;ty
Electronic
Coil
Control Unlt
Ground
OHMS
x !000
POINTS
See
Note # 1
11
Electronic
Control
U.It Case
1
Battery
Nee.(-)
Disconneet D|ttrtbutor Connector.
Wi_ RED €lip con'. netted tO Distributor Connector Cavity and BLACK cllp
€onnected to Dis_lbutor Cannect_t P;_, meter should toad belween 150 and 900 ohms.
Proceed to Tett K.
Scrape block paint off small sect;on of Electronic Control
Unit.
With key an, ta_ch GREEN IclIp to metal surface.
Meter should read tess them 0.25
volt.
If it reads higher,
turn off lgmitton Swltch, remove Electroni€ Control Unlf
from Car mounting surface, and _leen surface and Elec-
tronic Coritrol Unit base of dirt or paint. Remount and retest.
Note fl - Use GREEN end BLACK [earls for this te_t only.
If tests above do not !acute defectIve componenfs_ then the trouble ;s with the Electronic Contro_ U_t.
Since this unit
is mot _rvlceable, ;t must be replaced,
Page 4(_O1L CONNECTOR
TO "DEC" TERMINAL
(DISTRIBUTOR ELEC-
TRONIC CONTROL
YELLOW
IGNITION
SWITCH
GROUND
D.E,C.
MODULE
12 V.BATTERY
TO "BAT"
TERMINAL
DISTRIBUTOR
GROUND
BLADES
SOCKETS
FIGURE 48
ORA I(
BLACK
FORD ELECTRONIC
IGNITION SYSTEM
LE
BLACK
ORANGE
BLUE/
_OWN
* inspect Harne_s Connectors for
white & blue leod terminal as
1974_ 1975 and later models
Test Number 29 Continued
T{ST
A Battery State of Charge
SELECTOR
KNOB
POSITION
FORD ELECTRONIC IGNITION
CLIP
CONNECTIONS
RED I BLACK
16 VOLTS
2 I
Battery Battery
P_. (÷1 Neg,(_)
COMPONENTS
TEST PROCEDURE
AND RESULTS
Remove Call High Tensiot_ Wire from the dlstr_butor and
ground it.
Crank E_gtne, Meter should read at least
9 volts, If less, charge
High Tet'_ion Wire, battery and proceed.
Replace
B Resistance Wire
OHMS x_
9 i0 With Igttlttan Swttch OFF,, meter should read 1 to 2 ohms.
If reading is hlgher_ replace teslstance wire.
C Coil Primary
Reslston_e
OHMS
x 1
O Call Secot_dary
Cat_finulty
L_ ........................................
E Voltage Dt_t_
ir_ Resist_t_ce
Wire
OHMS x 1000
16 VOLTS
4
BAT,
Te_r_i_al
4
Coll
BAT,
Termir_l
2
B_ttery
Pos.(*)
9
Co{l
D[C
Te_mlr_l
11
Carl
Tower
Contact
4
Coil
BAT.
With ignitior_ Switch off, meter should iead i to 3 ohms,
If it does not,
with Test D, replace ignttiot_ Coil, 1f OK, proceed
Remove call high tension lead From coil rowe,.,., C0nne_t
BLACK ¢llp to inner €omact. With _g_itfo_ Switch off, mete_ should read 5,000 tO 25_000 ohms, !I it does not, replace coil,
With Ignitlot_ Switch or_, meter should read 5 to ? volts. if higher thot_ 7 votts_ recheck Test B, If Iowe% proceed with Tests F _r_d O.
F Power to
D_,C Module
O Pick*up Coll to Ground
H Pick-up Call
Con tl M_Jity j N_dule
Grou_
16 VOLTS
3
Whhe/Blue
Lead
Term;hal
1 flattery
Neg.
(-)
Seporote the Fk_mess Connector €ontaining Whlte/Blue
Wife from DEC Module, and connect RED cllp to Whltei
Blue Female L_d Terminal.
With Ignition Switch on, meter should read !0 to 1_ vOItt. If low or zero, _xtrform voltage drop test on lgmtlo¢_ Switch Retiit_nce Wtre_
Test E, It OK, replace Ignltlo_ Switch.
OHMS
x 1000
OHMS
x IOn0
POINTS
See
Note # 1
6
O_or_ge
Distributor
Pick -up
Conr_eeto_
Terminal
6
Oronge
Distributor
Pick -up
Connector
Terminal
1
Batter y
Neg, (-)
7
Purple
Distributor
Pi_k-up
Connecto¢
Terminal
8
DEC
Module
Case
1
8_ttery
Neg. -
Meter should not move, If there is movemet_t or o full scale reading_ replace Pick-up Call Assembly.
Meter should re_d between 400 arid 800 ohms. if it reads higher or Iowe_ replace Pick-up Coil Assembly.
With Ignitlot_ Switch on÷ momentarily touch GREEN cllp
to DEC Module Housing.
If meter reads more than
0.25
volt_ remove Module from mounting, ¢1_ _u_-
[a_:es, remount securely and retest.
Note 11 - USe GREEN md BLACK le_s for this test €_ly,
if tests €_bove do t_ot locate defective compo_ent_ then the trOuble is with the Electronic Co_ttot Unlt.
Sit_ce this unlt is not servi{:eoble_ it mu_t be replaced,
Page 48
Test Number 30
PINK LEAD
DISTRIBUTOR CAP
IGNITION
SWITCH
12 V BATTERY
NEG.
POS.
HiGH TENSION
OUTPUT
CONDENSER IS USED ONLY
FOR RADIO INTERFERENCE
SUPRESSION AND NOT AT
ALL INVOLVED IN IGNITIOI"
PERFORMANCE.
BROWN
GROUND
LOWER HOUSING
HARNESS
DISTRIBUTOR WiTH CAP
AND ROTOR REMOVED.
/
"WHITE -PiCK-UP
EN LEADS
ELECTRONIC
MODULE
DELCO HEI IGNITION SYSTEM WITH COIL IN DISTRIBUTOR CAP
FIGURE 49
• _w.
-t,_
_S!: Number _3Q,,Continued
DELCO HEI IGNITION COMPONENTS-SYSTEMS WITH COIL IN DISTRIBUTOR CAP
TEST KNOll CONNECTIONS
A flattery State of Charge
B lgnttton
Swffch
C Coil Prlmory
Reslst_nce
D Coil
Secondary lleil:_n_e
E CallPrlmary
Ca_ttnulty
F P,_werto
Ele_tronlc
Package
G Lower Housing
Harness
Conttnully
H Lower Ho_lng
Hameu
Continuity
J Pick-up Coil
Continuity
K Pick,.u_
Call to Ground
16 VOLTS
16 VOLTS
2
J_ttery
Pro,(÷)
4
Olst.Cap
Pink Lead
.
t
Battery
Neg.
(-)
Remove Pink Lead 4 from Dhtrlbutot Cop end crank e_gtne, Meter should _ead at least9,6 vghs.lf lawe_,
_herge tmtt_y a.d retest.
.
t fiettety
Nag.(-)
......................................................................................................
,.
............
¢.. ..................
Cgnne_:t RED clip to Pink Legd from Olstrlbutor Cap,
With Igr_itlo_ Switch m'_end engine nat running, meter ihoutd read 10 rafts or t_igher,
Ignltlon Switch circuit. if ice, _eplace
OHMS x I
OHMS
x lOCK)
3
OtiS,Ca-
8
BAT,
"G."T ere,
P Terr_,ot
Dht,Cap
I1
High 12
Ten_lon DIIt.Cap
Output Grid. Term
Terminol t6 VOLTS
3 l
Dl_t.Cap
Battery
"_-"Term, Nag,(=)
16 VOLTS
16 VOLTS
16 VO LIS oL_s x 1000
OHMS x IOgO
Remove Cap and Rote% and dhcon,e_t LowerHouth_g
Haree,s. Meter should read behveen 0.2 and 0.? ohms,
If meter doesnot read, replace Ignition Call located in Distributor Cop.
With Ignition Switch off÷ meter reads test than IO,O00 or more than 30_000 ohms, replace the ignition Coil
Assembly.
S
"B+"
Term,at
1
Battery
Dlst,Cop Nee, (*)
Rec_nect PI_ Le_d 4. lie s_xe st.mrthree hod Lower
Houd_g Horm_l tt dh_onnected _rom
Olsttlbutor Cap.
tarmacs REDclip to "C-_' term;_l, With Ignltlm
Switch on, meter shouldread at loess IO veiN.
With REDclip connected to "B÷" Termir_l end ignition
Swltch on, meter shou_ldreed at leatt 10 volts. If lower
or =ere, recheck Test_.
If *.till
and conne¢.'tlonsInside Distributor Cop Cover.
9
"B"
_'erm,on
Module
10
1
Battery
Nag.(-)
Term,on
Module
7
White
Pick-up
Lead
?
White
Pick.,up
Lead l
II_ttety
Nag.(-)
Rec_nect _r** I,od Lower Hou_tngHornes_€onnects.
With Ignition Switch on, meter sh_ld rood Ot least 10
volt_l, If low or z',ero, repair or replace three te_l
"Lower Hauslr_g
Hornets."
Connect REDcllp to Module "C-" terminal.
With ignition Switch _, meter should read at I_st
If low or zero, repair or replace three le_td
"Lower Houttng Harness." i0 volts.
6 Ditconnect Green and White Pick-up Llmds from Electronic
Green t_Jute er_ connect to RED=endBLACK ¢llp_. Meter lheald
Ptck=up read between 550 and 1,_lO ohms. If It d_tt nat, tapioca
Lead Pick-up Call Alsembly.
I
Battery.
Neg,(-)
Connect RED clip to white Pick-up Lead, lie certain
GREEN L_d Is clear from oil metal to'facet, h_lter
thould not move, tf it does, replace Pick*up Coil
A,embly,
If tests ==bore do not Io¢ote defective components, then the trouble is wlfh the Electronic Control Unit, Since this unlt is not lervlceoble, it mu_t be replaced.
Page 50
Test Number 31
IGNITION SWITCH
NEG
POS.
IGNITION SWITCH
FEED TERMINAL
COiL CONNECTOR
'HIGH TENSION
OUTPUT TERMINAL
L
HOUSING
HARNESS
GROUND
FIGURE 50
DELCO HEI IGNITION SYSTEM WiTH SEPARATE COIL
CONDENSER iS USED ONLY
FOR RADIO INTERFERENCE
SUPRESSiON AND NOT AT
ALL INVOD/ED IN IGNITION
PERFORMANCE.
Test Number 31 Continued
DELCO HEi IGNITION COMPONENTS-SYSTEMS
TEST
A Battery
State of
Charge
SELEC TaR
KNOB
POSITION
CLIP
CONNECTIONS
16 VOLTS
RED
2 l_ttery
Pm.(_)
I
BLACK
|
Battery
Neg,(-)
WITH SEPARATE COIL
................
TEST
AND
PROCEDUR_
RESULTS
, 1..........
Remove Ignition Swift_h Feed Terminal from Coil and crank engine.
Meter should read at least 9.6 volts.
I( lower, charge b_ttery and proceed, rage b_
C Call
P_;_ary
Resist'a_ce
16 VOLTS
4
Ignition
Feed_re l
Battery
Neg.(-)
OHMS x !
5
_gMft;on
Coil
Term_rv_I
6
Coil
Terminal
Remove coil cover and Igt_ttlo_ Wire No, 4, Connect
REO clip to Ignition Switch Feed Termlrml.
With
tgnit_on Switch on, meter should read at least I0 volts.
If low or z_o, replace tgnttlon Switch circuit.
Remove Colt Con_ect;on_ and connect RED clip to Ig_ition Coil Tevm;_l, and BLACK clip to Colt Terminat,
Meter should read between 0.2
and 0,7 ohms.
D Call Secondary
Resistance
F Lower Housing
H,ar net_ (grOwn)
Continuity
G
Lowe_ Ha_ing
Harness (Red)
Continuity
Pick-up
Coil
Reslsl_nce
H Pick-up Coil to Ground
OHMS x TO00
3
Hhjh
Tension
Output
Terminal
S
, Ignitlc_
Coil
Term;rot
Remove Coil High Tension Wire_ and connect RED clip
to High Tern;on O_ttput Te,'minol, BLACK clip to igni-
slam Call Term;hal.
Meter shou4d read between 6,000
a_d 12,000 ohms, 'If not, replace ¢ot!.
Reconnect
High TensIon Wire,
16 VOLTS tri_,l
Term;nall_ on
Module
11 l
Battery
Neg.(-)
I
Battery
Neg (-)
t6 VO LTS Terminal on
Module
OHMS x I000
WEtte
Pick-up
Le_d
1
Green
Pick-up
Lead
OHMS x 1000 e
Wl_lt,
Pick-up
Lead
I
Ik_tlery
Neg, (-)
Remove disl_'Ibuto¢ cap and rotor, Reconnect Colt Connecta¢ and Ignition Feed Wire to Coil, With Ign;tion
Swffch on_ meter should re_d at ieatt |0 volts, tf lower, repair at replace i_wer Housing Ha_e.,
With Ignit;o_ Swit¢_ o_, meter should read at least l0 volts, It lower, repoh" of replace Lower Housing
Homes| _
Disconnect Green and W_lte Pick-up Leads from Module and connect to RED and BLACK cllp_, Meter should read between 500 and l,.SO0 ohms. If it does not, replace Pick-up Coil A.embty_
C_nect RED clip to White Plck-up Lead.
Be certain Green
Lead Is €iemr from 01i moist sucre:m, /v_ter d_ould not move.
It' It _wt_, r_l_|oce Plck..u_
Coil A.embly.
dlswibutor coo and €olor.
Reinstall
if test_ above do not lahore defective components, then the trouble ;s with the Electronic Control Unit.
Since thIs u_it
it not servIceoble, it mutt be repla_ed.
Page 52
Introduced in 1978 on a limited number of California mandated emission- controlled engines, the C-4 System is now standard equipment on most of the Genera] Motors cars (except diesel and EFI).
The main functlon_of the
C-4 System is to maintain the carburetor air-fuel ratio at 14.7 to 1.0--the most efficient operating ratio for the catalytic converter. The electronic carburetor receives a DWELL-TYPE voltage from the EleCtronic Control Module
(ECM) to maintain this air-fuel ratio under widely varying driving conditions.
The Craftsman Engine Analyzer can be used to check this voltage by reading the six-cylinder DWELL scale, 0-60°, and by performing the procedure in this section.
IMPORTANT--The C-4 System could be malfunctioning when any of the following
conditions are noticed:
The vehicle instrument panel "CHECK ENGINE" light illuminates.
Poor engine performance which includes=
1.
Poor gas mileage
2.
Lack of response to throttle
3.
Hesitation, stalling, etc.
Complete C-4 System diagnostics, troubleshooting, and repair procedures demand that you obtain the specific service manual f_r your vehicle and engine combination.
CONNECTIONS:
On G.M. cars equipped with the C-4 System, a small, green, single-contact
DWELLMETER connector is normally provided to check the DWELL voltage to the carburetor (usually located under the hood near the right front fender wheel well, or near the carburetor, protruding from the wiring harness).
DO NOT ALLOW THE LEADS TO TOUCH GROUND OR HOSES--THE HOSES MAY
ALSO BE CONDUCTIVE.
Use the adapter pin as shown in the figure below.
Connect the GREEN clip from the Craftsman Engine Analyzer to the adapter pin.
Connect the
BLACK clip to a clean and secure ground such as the engine block, and the
RED clip to the positive (+) battery terminal.
NOTE: The DWELLMETER should NOT cause a change in the engine operation when connected to the vehicle's DWELLMETER connector.
If there is reason to suspect that a change did occur, recheck your connections.
TEST PROCEDURE
Position the FUNCTION SELECTOR switch on the Craftsman Engine Analyzer in the DWELL position.
All readings will be taken from the 6-cylinder
DWELL scale (0-60°), regardless of the number of engine cylinders in the vehicle under test.
The following table is a typical C-4 System Performance Summary illustrating the DWELLMETER readings under the given engine conditions.
ENGINE CONDITION DWELLMETERREADINGS
I.
Start Mode (cranking)
.
Warm engine operation at idle or part-throttle with constant engine speed. See Note Below.
0 o
Constantly varying between i0_ and 50_ (Higher engine speeds result in faster variations.)
3_
Acceleration and deceleration
(changing engine speed)
Constantly varylng between
10_ and 50° (DWELL variations may not be easily discernible on the DWELLMETER during rapid accelerations or decelerations but may be seen on slower changes in engine RPM)
Approx. 6° 4.
Wide open throttle (W. O. T.)
(under engine load--on the road
or with dynamometer).
NOTE: The input to the C-4 System which causes the Constantly varying
DWELL reading is an oxygen sensor mounted on the exhaust manifold working through the ECM.
This sensor must typically be above 6000 F to operate properly.
Engine cooling, restart, or excessive idling could cause the sensor to go below 600°F in which case the DWELLMETER reading will be some FIXED value between I0° and 50°.
This syst@m may require three to four minutes to reach temperature after a restart or cool-down to resume the VARYING-DWELL operational mode.
ADAYTOR PLUG CONNECTOR
FIGURE 51
Used to provide Dwell Con-
nection on G.M. C-4 Systems.
Page
53
Test Number 33--Ground Strap!est(EnginetoBodyJ
The ground strap from the vehicle body to the engine provides the return circuit from the lights and other accessories to the battery.
A defective ground strap or ground connections could cause an inaccurate voltage regulator setting, resulting in higher voltages to the electrical system.
The ground strap can be tested as follows:
Page 54
I.
Insert the BLACK test lead p]ug into the BLACK "OTHER TESTS,' socket.
2.
Connect the BLACK clip to a clean connection on the engine block and the GREEN cllp to a clean connection on the car body.
Scrape away grease or paint, if necessary, to make a good metal-to-metal connection.
3.
Rotate Selector Switch to the POINTS LO VOLTS position.
4.
Start engine and operate at approximately 1200 RPM.
B.
Turn on headlights and note reading on the 0-3.2 Volt scale.
GOOD--A reading less than .i volt indicates a good ground strap and connections.
HIGH--A reading exceeding .I volt indicates a defective ground strap or its connections.
Clean the ground strap connections and repeat test before replacing ground strap.
GREEN
BLACK
REDCLiP
USED
•tD "L5 PJZ3 2
G OOD"I-"_E -'_" HIGH
GROUND STRAP TEST (ENGINE TO BODY)
FIGURE 52
Test Number 34A--Puse Tests
Automotive fuses can be tested as follows:
Connect the BLACK clip from the analyzer's voltmeter lead to a good ground on the engine or car body.
Turn the Function Selector Switch to the VOLTS position.
Insert the BLACK plug into the BLACK OTHER TESTS socket.
T_rn the ignition switch to the ACC. position and turn on the accessory associated with the fuse that is to be tested.
Then touch both sides of the fuse with the RED clip.
If the meter indicates battery voltage on.both sides of the fuse, the fuse is good.
If it indicates battery voltage on one side and nothing on the other, the fuse is open.
If there is no reading on either side, there is an open circuit between the fuse and the battery vage _
RED
_REEN CLiP NOT
On General Motors cars equipped with "Autofuse" blockss insert a small nail _ bare wlre in the RED
clip as shown and use it as a test probe.
BLACK
FUSE TEST CONNECTIONS
FIBURE 53
Paqe 56
Test Number 34B--Horn
I,
2.
Set the Function Selector Switch to the VOLTS position,
Using the ALL OTHER TESTS leads, connect RED lead to the terminal
of the horn relay that connects to the horns and BLACK lead to a good ground as shown in Figure 57.
(Reverse leads for a positive ground system).
MORN
HORN AND RELAY
CIRCUIT CONNECTIONS
HORN RELAY
BLACK
TEST RESULTS
FIGURE 54
ZERO READING
I, Defective horn relay
2.
Defective horn rlng
3.
A break in wtr|ng be*,
tween the horn ring and relay
6
READING LESS
THAN i0 VOLTS
1.
Defective horn
2.
Defective wires
3.
Relay points not making good contact
$
/ r
10
GOOD
Horn operating range
BATTERY VOLTAGE
READING
1.
Open circuit in horn
2.
Break in wiring be-
tween relay and horn
%
Test Number 34C--Low Volt.ageIJropTests
in addition to the POINT RESISTANCE test described on page 20, this position can be used to test the vehicle's electrical system for low voltage drops.
Set the Function Selector Knob to the POINTS LOW VOLTS position.
Insert the BLACK plug into the BLACK OTHER TESTS socket.
Read test results
on the 0-3.2 Volt scale. Each division on this scale is .I volt. This
scale has internal protection to prevent damage if the leads are accidentally connected across full battery vol.tage. Use the GREEN and BLACK clips to make the tests.
The RED clip is not used.
Corroded or loose connections and frayed or broken cables can cause excessive voltage drops in the starting circuit which can cause hard startlng, To test for these conditions, connect the clips between I and 2, 2 and 3, 4 and 5, 5 and 6, 6 and 7, 7 and B, with the starter turning, Be sure the high voltage lead is disconnected from the coll so the engine won't start.
During this test, no reading should be higher than .2 volts.
If a reading higher than .2 volts is observed during any of these tests, check the
cable or connections involved, clean and tighten the connections and replace the cables or solenoid when necessary.
If the meter reads to the
left of zero during any of the above tests, reverse the pos(tlon of the clips.
®
®
Page
STARTE R
BATTERY
VOLTAGE LOSS TEST CONNECTIONS
FIGURE 5S
Page 5B
With the increased sophistication of today's emission control systems, many more solenoids are used than ever before.
Air injection, EGR Action, and throttle positioning are a few examples of the usage of solenoids.
Basically a solenoid converts an electrical signal into mechanical movement.
Hence they can be used to move valves or repositlon the throttle.
Since they are electrlcally operated, your Craftsman
Voltmeter and Ohmmeter can be used in conjunction with your vehlcle service manual to confirm their proper operation.
The service manual will tell when voltage should be present at the solenoid and thevalue to activate it.
The Ohmmeter can check whether or not the coil in the solenoid is open or shorted.
Follow your vehicle service manual's instructions in all cases.
The OHMS scale is used to test the various lamps in the vehicle (headlamps, parking lamps, convenience lamps, etc.) To test the lamps, remove the
lamp from the socket or otherwise disconnect from the circuit to prevent possible damage to the analyzer.
CONNECTIONS: i.
Insert the white plug OHMS lead into the corresponding tester socket,
Connect the RED and BLACK clips to the lamp under test.
Some lamps have two filaments and each must be tested separately.
3.
Set the Function Selector switch to the OHMS position.
4, Set the Range Selector Switch to the LOW scale. The cold filament resistance will read very low--typically less than 10 OHMS.
5.
If the meter reads oo , (extreme right hand side of the scale) the filament is open-clrculted and the lamp must be replaced.
Test Number 34F--Motor Windings
The OHMS scale can be used to test the windings of many of the motors used in today's vehicles such as the blower, wiper, headlamp doors, and power window motors.
Always make certain when testing the suspect motor that it is completely disconnected from the vehicle.
This will prevent false readings as well as possible damage to the Analyzer.
With the guidance of your vehicle service manual you will be able to h motor frame.
Your vehicle service manual will specify what resistance in
ohms should be present across the various motor leads.
These values will typically be low in value, hence the X i position of the Craftsman Analyzer
Range Selector should be used,
The Rear Window Defroster Grid can be checked quite easily with your
Craftsman Analyzer.
You will use either the VOLTMETER, 0-16 VOLTS, or the OHMMETER (X I) for performing these tests.
Specific test procedures are outlined in your vehicle service manual.
Resistances encountered in these circuits will be very low, typically less than one ohm.
CAUTION: Do not test across Grid Lines on the glass. _Although this electrically conductive coating is baked onto the glass, it can be scratched, causing an open circuit and rendering all or part of the heated rear window inoperable, Measure only at the terminals wlth connector disconnected,
WARNING: Ford Motor Company uses a separate high voltage alternator for
Its quick defrost windshield and rear window on some car lines. Operating voltage in this system approaches 120 Volts A. C. Do not attempt to test this system while "llve".
Make only Ohmeter Tests as instructed in the
Ford Manual with the engine offl
Test Number 34H--Electrical Wiring Harness
All power distribution within the vehicle takes place _ia one or more
color coded wiring harnesses.
If a wire in the harness breaks or a
connector is loose or corroded, voltage will not arrive at its intended destination.
The end result of this is that one or more electrically operated devices in the vehicle will not operate as they should.
By using your Craftsman Analyzer, Voltmeter, Ohmmeter, and Points (Low
Voltmeter) functions, and with the guidance of your service manual you can
correct certain harness defects.
CAUTION: If you are tracing voltage through a given system, be careful not to short that voltage to ground.
A spark can cause electrical system damage or in the vicinity of the fuel system vapors could ignite and cause a fire, and personal injury.
Page 5!
I
lulul)C_i(_........
i
!
¸,Ji-
Part No.
290-102
450-132
210-105
450-130
STD610605
400-290
180-740
1000-752
180-739
400-467
38-5i3
38...512
38-568
38-514
1000-840
1000-2.52
180-457
260-183
260-171
180-618
1000-248
180-298
180-293
38-396
1000-425
2.170701
1000-836
25-i85
Key No.
6
7
4
5
2
1
3
8
9 ii
10 i2
13
14
19
20
2 i
22
23
24
25
26
15
16
17
18
27
28
TABLE i
DescHptlon
Nut s 3/8-32
Knob, Selector
Washer, Flat 3/8
Glamor Cap
Screwe Self Tap #6 x i/2 Lg.
Rest Pad (2)
Cases Bottom and Back
Case_ Top Assembly
Case, Baffle
Rest Pad (2)
Cable Assemblyt Ohms
Cable Assembly_ Other Tests
Cable Auemblyw toch Pick-Up
Cable Assembly, Amp,,
(Cable Only)
Battery Adaptor
Shunt and Terminal Assembly
Starter Shunt
Thumb Screw
Screw Flex 3/8-i6 x 1-1/4"
Battery Adaptoru Male
Lg.
A I ternatar Adaptor
Adaptor Spd ng (Foreign)
Adaptor Sprlng (Domestlc)
Wire Adaptor (Jumper)
Accessory Kit
Instruction Manual (Not illustrated)
Complete Accessory KIt
(Not Illustrated)
I/4 OHM Resistor
owners manual
i r r Ir M.
i r r lint I nl ................................
ENGINE
ANALYZER
Now that you have purchased your CRAFTSMAN
ENGINE ANALYZER_ should a need ever exist
for repair parts or service, simply contact any
Sears, Roebuck and Co, stores.
Be sure to pro- vide all pertinent facts when you call or visit.
The model number of your ENGINE ANALYZER
can be found on the front of the instrument.
MODEL NO.
161.210400
HOW TO ORDER
REPAIRPARTS
l
WHEN ORDERING
GIVE THE FOLLOWING
REPAIR PARTS,
INFORMATION"
ALWAYS
PART NUMBER !
PART DESCRIPTION
• MODEL NUMBER • NAME OF ITEM
All parts listed may be ordered from any Sears
Service Center and most Sears stores. tf the parts you need are not stocked locally, your order will be electronically transmitted to a Sears
Repair Parts Distribution Center for handling.
........................
, ,i, ......
2z
II I
.........................
.....
i[i i illlll]ll I i I Jill .................................
................
ii lllll i i iiiiii i ...................
SEARS, ROEBUCK AND CO. U.S.A
CHICAGO, ILLINOIS 60684
- ..........................
- ...............................................
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