VHX
Analog / Digital Gauge System
INSTALLATION AND OPERATION MANUAL
Please read this before beginning installation or wiring.
IMPORTANT NOTE!
This system has an odometer preset option that is only
available for the first 100 miles of operation. See odometer preset section (pg 26)
for instructions and setup information.
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MAN 650314:D
Thank you for purchasing a VHX system from DAKOTA DIGITAL. VHX is a loose
acronym for Vehicle Hybrid Instrument Systems. Representing the latest electronic dashboard
technology for the street rodder, car, and truck enthusiast alike, the VHX system combines
modern digital electronics with a traditional look to give the driver up-to-date and accurate
information on the operation of his or her vehicle. Fully lit needles, backlit faces, and highly
visible LCD message centers are a few features that make the VHX lineup stand out from other
aftermarket instrumentation. The VHX system boasts excellent daytime visibility and while under
computer control, fully backlit and dimmable for nighttime driving. Monitoring solid state sensors
with microprocessor technology and driving precision stepper motors, the VHX dashboard gives
the driver unparalleled accuracy. User-customizable display feedback and additional features not
typically found on any other brand or type of instrumentation are standard in the VHX system.
Digital accuracy and solid state reliability will give you, the driver, quality service for miles down
the road that includes a limited lifetime warranty on a product engineered and manufactured in
the USA!
VHX INSTRUMENT SYSTEM FEATURES
Digital LCD displays
• Each of the six analog gauges can be displayed here as well as additional functions listed below. Features
are available on either display (L or R).
Mileage readings
• Million mile odometer.
• Two (A/B) re-settable trip odometer (0-9999.9).
• Re-settable service odometer (0-9999 countdown).
Performance readings
• High speed recall. This can be manually reset during normal operation.
• High RPM recall. This can be manually reset during normal operation.
• 0-60 mph (0-100kmh) time.
• ¼ mile time. This can manually reset during normal operation.
• ¼ mile end speed (trap speed). This is reset when the ¼ mile time restarts.
Hour meter
• Resettable hours (0-999.9).
English/metric conversion
• Alternate speed and temperature can be displayed in LCD display.
Built-in Indicators
• Left/Right Turn signal indicators.
• High Beam indicator.
• Check Engine indicator.
• Brake warning indicator.
• 4x4 indicator.
• Wait to Start indicator.
• Cruise control indicator.
• Gear position indicator which displays full gear word with use of Dakota Digital GSS-2000.
(purchased separately)
Special outputs
• Shift output to activate external light
• Selectable 2000ppm or 4000ppm speed output for cruise or ECM (not available when using BIM-01-1 for
speed)
Demonstration mode
• Holding Switch 2 while turning on the key will start the system going through a preset sequence of readings.
To exit the demo mode, turn the key off. You may also wire up a separate switch to power the gauges for
demo mode without powering the entire vehicle.
Auxiliary gauge readings in LCD message displays with expansion bus interface modules (BIM)
(purchased separately)
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MAN 650314:D
TYPICAL VHX DISPLAY LAYOUTS
Speed/LCD1 Message Center
Tach/LCD2 Message Center
Speed/LCD1 Message Center
Tach/LCD2 Message Center
Speed/LCD1 Message Center
Tach/LCD2 Message Center
Speed/LCD1 Message Center
Tach/LCD2 Message Center
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MAN 650314:D
WARNING
These are precision instruments and must be handled with care. Do not disassemble gauges.
CARE AND CLEANING
Never open the system or attempt to remove the needles as the calibration of the
instrument system could be thrown off. All systems are calibrated and tested before they
leave Dakota Digital.
The clear lens on the front of the VHX system can be cleaned with a mild soap and water
solution or common glass cleaners. Use a soft cloth such as a micro-fiber for wiping the lens
clean.
MOUNTING SYSTEMS
Most VHX systems and kits will come with a separate instruction sheet with mounting
details. Follow this sheet for mounting the actual display system in the dash, and then refer to
this manual for wiring and operation instructions.
CONTROL BOX MOUNTING
Once the display panel is in place, mount the control box within reach of the supplied
networking cable (approximately three (3) feet). If a longer cable is required, replacement CAT5
cables are available online as well as your local electronics stores. Choose a mounting location
that will allow you access to wire all of the inputs on either side of the control box. Double sided
tape, hook and loop fasteners or screws in the two tabs on the case work fine for securing the
control box under the dash.
When selecting a mounting location, avoid placing the control module next to, or
just opposite of the firewall from, ignition components, i.e.: Ignition coil, HEI, etc. Ignition
components can emit tremendous amounts of electrical noise, affecting the operation of
electrical components which can cause erratic operation.
***If you are purchasing a longer network cable to connect the display system to the
control box please make sure to get a CAT 5, CAT5E, or CAT6 “patch cable” and NOT a
“cross over” cable. Replacement cable should be seven feet or less.
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MAN 650314:D
WIRING
While the control box contains several connections, the wiring is straightforward.
Depending on how many auxiliary functions you want displayed, not every terminal will be used in
most applications. On the pages that follow, we describe the function of each terminal, what they
do, and how to wire them.
Parking Brake
Switch
ECU/ECM
Check Engine
Output
High Beam
Wire
DISPLAY PANEL
Connect to tail light circuit,
LED backlights will turn on
when termianl has +12V
Left Turn
Signal Wire
Tail Light
4x4
Transfer Case
Switch
Right Turn
Signal Wire
DAKOTA DIGITAL
GSS UNIT
1-Wire output
BIM
CONNECTION
ONLY!
Optional
CAT 5
Cable
(To Display)
Glow Plug Relay
or
Wait To Start
Output
VHX
CONTROL BOX
SW1 (-)
SW2 (-)
ADJ ADJ SND
WTR WTR SND
OIL OIL SND
OIL +
FUEL FUEL SND
FUEL +
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techsupport@dakotadigital.com
605-332-6513
STATUS LED
Additional ground wire to fuel
sensor body or mounting screw.
RED
WHITE
BLACK
BLUE or RED
BROWN or BLACK
RED
WHITE
BLACK
EXISTING
FUEL LEVEL
SENSOR
Engage Output
SPD OUT
SPD SPD SND
SPD +
AUX.
I/O
DIM (+)
CHECK ENG (-)
BRAKE (-)
HIGH (+)
LEFT (+)
WARN
RIGHT (+)
TACH
4x4 (-)
ACC. POWER
GEAR (1 WIRE)
CONST. POWER
WAIT (+)
GROUND
CRUISE (-)
Cruise Control
DISPLAY
CABLE
Connect to main
chassis ground
+12V
CONSTANT POWER
(fused 5 - 20 AMP max)
+12V
KEY ON POWER
(fused 5 - 20 AMP max)
- +
PRESSURE SENSOR
SEN-03-8
0-100 PSI
ECU/ECM
or Ignition Box
(tach output)
Ignition Coil
(negative side)
TO
Light or Buzzer
(4 Watts or less)
Relay
R
SW
Y
R
TA
EN
M
2
SW
1
Optional
SPEED OUT
(2k or 4k PPM)
ECU/ECM
Speed Output
E A
LS E R
PU EN
G
Y
R
O
M
DIM-1
TA
EN
M
O
M
TEMP SENSOR
SEN-04-5
100-300 F
SPEED SENSOR
SEN-01-5
16k PPM
Light or Buzzer
(4 Watts or more)
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TERMINAL DESCRIPTIONS
OIL OIL SND
OIL +
NIGHT DIMMING ADJUSTMENT GROUND OUTPUT
NIGHT DIMMING ADJUSTMENT INPUT
ADJ ADJ SND
2000 PPM SPEED SIGNAL OUTPUT
VEHICLE SPEED SENSOR GROUND OUTPUT
VEHICLE SPEED SENSOR SIGNAL INPUT
VEHICLE SPEED SENSOR POWER OUTPUT
RPM WARNING/SHIFT OUTPUT
TACHOMETER INPUT
+12 VOLT ACCESSORY POWER INPUT
+12 VOLT CONSTANT POWER INPUT
MAIN CHASSIS GROUND INPUT
SW1 (-)
SW2 (-)
AUX.
I/O
SPEED SELECT SWITCH INPUT SW1
TACH SELECT SWITCH INPUT SW2
DIM (+)
CHECK ENG (-)
BRAKE (-)
HIGH (+)
LEFT (+)
WARN
RIGHT (+)
TACH
4x4 (-)
ACC. POWER
GEAR (1 WIRE)
CONST. POWER
WAIT (+)
GROUND
CRUISE (-)
SPD OUT
SPD SPD SND
SPD +
TO DISPLAY
CONNECTOR
(Doesn't matter which one)
VHX
WTR WTR SND
CONTROL BOX
WATER TEMPERATURE SENSOR GROUND OUTPUT
WATER TEMPERATURE SENSOR INPUT
DISPLAY
CABLE
OIL PRESSURE SENSOR GROUND OUTPUT
OIL PRESSURE SENSOR INPUT
OIL PRESSURE SENSOR POWER OUTPUT
FUEL FUEL SND
FUEL +
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605-332-6513
FUEL LEVEL SENSOR GROUND OUTPUT
FUEL LEVEL SENSOR INPUT
FUEL LEVEL SENSOR POWER OUTPUT
BIM CONNECTION
NIGHT DIMMING INPUT
CHECK ENGINE INDICATOR INPUT
BRAKE SYSTEM/PARKING BRAKE WARNING INPUT
HIGH BEAM INDICATOR INPUT
LEFT TURN SIGNAL INDICATOR INPUT
RIGHT TURN SIGNAL INDICATOR INPUT
4 WHEEL DRIVE INDICATOR INPUT
1-WIRE GEAR INDICATOR INPUT (FROM GSS UNIT)
WAIT TO START INDICATOR INPUT
CRUISE ENGAGED INDICATOR INPUT
STATUS LED
STATUS LED
This LED is located at the corner of the control box, next to the GROUND terminal. The
LED is used for diagnostics and for a quick visual check if power is present.
• A steady flash, on and off, about twice a second indicates the system is powered and
operating normally.
• On steady indicates low power, below 9V, at the POWER terminals, or that the system is
in DEMO mode.
• A short flash once every four seconds indicates the CONSTANT POWER terminal is
powered and the system is in stand-by mode.
• Not flashing or lighting indicates loss of power or ground.
GROUND
This is the main ground for the display system. A wire should be run from this terminal to
the vehicle’s main chassis ground. Use 18 AWG or larger wire to ensure sufficient grounding.
Proper vehicle grounding is extremely important for any gauge (or electronics) to operate
correctly. The engine block should have heavy ground cables to the battery, frame, firewall, and
body. Failure to properly ground the engine block or the control box can cause incorrect
or erratic operation.
CONST. POWER
Connect the CONST. POWER terminal to a +12V power from the fuse panel that is “hot”
all of the time, or a fussed wire (5-20 amp) direct to battery power. This terminal should have
power all of the time. The constant +12V supply source should be a fused 5 - 20 amp circuit, the
system draws less than 1 amp, so sharing an existing constant power circuit will generally be fine.
Use 18 AWG wire to ensure the system receives a sufficient power feed. This terminal keeps the
clock memory as well as returning the needles to zero when the system is shut off.
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MAN 650314:D
ACC. POWER
Connect the ACC. POWER terminal to accessory +12V power from the fuse panel or
vehicle wiring harness. This terminal should have power when the key is on or in the ‘accessory’
position. In addition to turning on the display system, this is also where the voltmeter gauge
senses the vehicle electrical system voltage. The accessory +12V supply source should be a
fused 5 - 20 amp circuit, the system draws less than 1 amp, so sharing an existing accessory
circuit will generally be fine. Use 18 AWG wire to ensure the system receives a sufficient power
feed.
*** Never connect any power terminal to a battery charger alone. The system needs to
have a 12 volt battery connected to it. Battery chargers have an unregulated voltage
output that will cause the system to not operate properly and may cause damage to the
control box.
TACH
Connect the TACH terminal to the ignition system. •On vehicles using a separate ignition
coil, connect to the negative side of the coil. The negative side of the coil will be the wire that
goes to the points or electronic ignition module. •For GM HEI ignition equipped engines, connect
to the terminal marked “TACH” or on some systems, a single white wire with a spade terminal on
it. •On some aftermarket ignition systems, connect to the TACH output terminal. •On computer
controlled ignition systems consult a service manual for the wire color and location. •With a
magneto system, connect to the kill wire for the tach signal. Do not connect the TACH terminal
to the secondary, or high voltage, side of the ignition coil.
To avoid having to locate a compatible connection, a Dakota Digital BIM-01-1 may also be
used with most 1996 or newer OBDII compliant computer systems to provide a tachometer
reading. When using the BIM-01-1, select “BUS” for the engine cylinder setting.
To ensure that the ignition system does not interfere with any other dashboard functions,
do not run the tachometer wire alongside any other sender or input wires. DO NOT USE SOLID
CORE SPARK PLUG WIRES WITH THIS DASHBOARD SYSTEM. Solid core ignition wires
cause a large amount of electromagnetic and radio frequency interference which can disrupt the
system operation.
The tachometer is compatible with almost all gasoline engines. The engine cylinder
selection, display update rate, tach signal type, and RPM warning point can be adjusted in the
setup menu under “TACH”. If a diesel engine is being used, you will need a tach interface such as
Dakota Digital’s DSL-1 or DSL-2. Be aware of the cylinder setting when using computer outputs
or reading the tach signal from an ECU. Some GM LS1 engines require the tach to be set up for
a 4 cylinder, low voltage signal when reading from the ECU even though it is a V8 engine.
WARN
The WARN terminal is an output to activate a small light or relay for a red-line or shift
indicator. The output is ground-activated when the preset warn RPM limit is exceeded. This
output can turn on a 4 Watt or smaller 12V bulb or can activate a relay to turn on a larger bulb or
buzzer. To wire a warning light to this output, connect one wire from the bulb to 12 volt accessory
power and connect the other wire to the WARN terminal.
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MAN 650314:D
If you need the warn output to be “active high” or provide a +12V voltage to power
something larger than 4 watt, a standard 12V relay can be used to accomplish this.
30
85
86
DO NOT CONNECT
87
SPD +
This terminal is used to supply power to Dakota Digital speed sensor SEN-01-5. This
supplies 5V DC to the sensor and should not be connected to anything else. Connect the RED
wire from the SEN-01-5 to this terminal.
If you are using a 1-wire VSS output from a computer or a 2-wire pulse generator, this
terminal should be left open.
***DO NOT use this terminal to power any other devices; it is a low current +5V output.
SPD SND
This is where the vehicle speed sensor (VSS) connects. The signal supplied to this
terminal will be used by the control box to calculate the speed reading on the display and also for
calculating and saving odometer mileage.
Dakota Digital supplies a 3-wire sensor for most of its kits; SEN-01-5. If you are using this
sensor, the WHITE wire is the speed signal; connect to SPD SND. The RED and BLACK wires in
the cable are power and ground (5V DC) and their connection is discussed in SPD + and SPD -.
For 2-wire speed sensors such as a cable driven pulse generator, the polarity of the wires
does not matter. Connect one wire to the SPD – (Ground) and the other to the SPD SND
terminal. The speed sensor ground wire should be brought back to the control box to ensure a
proper signal is received. Twisting the ground and signal wires around each other provides an
additional level of interference protection. The speed signal wire should not be routed alongside
tach, ignition, or other high current or high voltage wires.
For vehicles which have a vehicle speed signal from a transmission sensor or ECM, tap
into the VSS wire and connect it to the SPD SND. Consult a vehicle service manual or wiring
diagram to determine wire color and location.
To avoid having to locate a compatible connection, a Dakota Digital BIM-01-1 may also be
used with most 1996 or newer OBDII compliant computer systems to provide a speedometer
reading. When using the BIM-01-1, select “BUS” for the sender setting.
This system can accept 4,000 ppm – 128,000 ppm speed signals with room for
adjustment. The speedometer is fully adjustable and calibration is discussed in a later section.
***Failure to calibrate the speedometer may cause your odometer mileage to
increase very rapidly if the speedometer is reading too fast.
*** The speed signal wire should NOT be routed alongside ignition components,
tach signal, or other high current/voltage wires.
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MAN 650314:D
SPD –
This terminal is used for speed sensor ground. The wire color is BLACK on a 3-wire
sensor. This insures a proper ground as well as providing proper hook-up for a twisted pair of
wires, or a solid state sensor. Only ground the speed sensor here. If you are using a single wire
output from a computer for the VSS then this terminal should be left open.
SPD OUT
This terminal can be used to supply a speed signal to auxiliary devices such as a cruise
control or radio volume adjustment. The output is scaled to the input speed signal coming into
the SPD SND terminal. It can be set to 2,000 PPM or 4,000 PPM.
***If you are using the BIM-01-1 bus speed signal option this output will NOT work.
SW2 (-) or Tach switch
The SW2 terminal is used for selecting the various RPM, engine, and performance
displays and also for entering the demonstration mode. The SW2 input is activated by a ground
connection. The push button switch supplied (or any normally open, momentary switch) is wired
by connecting one wire to SW2 and the other wire to a ground. When the button is pressed and
released, the tach/LCD2 message display will change. When the button is pressed and held for a
few seconds, any re-settable information displayed will be zeroed.
To enter DEMO mode, press and hold SW2 while turning the key on. The system will light
up and say DAKOTA DIGITAL on the message readouts; release the switch and the system will
stay in demo mode until the power is cycled off and back on without the switch held. All back
lights will be on in demo mode and the needles will sweep back and forth on the gauges.
SW1 (-) or Speed switch
The SW1 terminal is used for selecting the various speed, distance, and warning displays
and also for entering the setup menu. The SW1 input is activated by a ground connection. The
push button switch supplied (or any momentary normally open switch) is wired by connecting one
wire to SW1 and the other wire to a ground. When the button is pressed and released, the
speed/LCD1 message display will change. When the button is pressed and held for a few
seconds, any re-settable information displayed will be zeroed.
ADJ SND
The ADJ SND terminal is an optionally used input that allows you to have control over the
dimming brightness. By default, the system will turn on the back lights when the DIM terminal
has power, +12V, but this level is adjustable in the Lighting setup menu. Using the ADJ SND
terminal allows you to have a dash mounted control to vary the brightness while the headlights
are on. This requires Dakota Digital’s DIM-1 kit; a stock headlight rheostat will not work.
The DIM-1 has a WHITE/BLUE wire and a BLACK wire. Connect the WHITE/BLUE to the
ADJ SND terminal and the BLACK to ADJ - ground. The dash mounted dimmer will only vary the
display brightness when the DIM terminal has power, +12V.
ADJ –
This terminal provides a ground reference for the optionally installed DIM-1 for dash
mounted dimming control. The BLACK wire will connect to the ADJ – terminal, the
WHITE/BLUE connects to the ADJ SND.
*This terminal should not be used for grounding any other sensors or devices as damage
to the control box will occur. If not using a Dakota Digital DIM-1, this terminal should be
left open.
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MAN 650314:D
WTR SND
The water temperature sender included with this system must be used. Other
senders will cause incorrect readings or damage to the control box.
The supplied sensor, Dakota Digital SEN-04-5, is a 100-300ºF(40-150ºC) temp sensor.
The sender mounts in the engine block, cylinder head, or intake manifold so that the end of the
sensor is in the engine coolant flow. It has 1/8” NPT threads and the included adaptor bushings
may be used to adapt it for various applications.
To avoid mounting an additional temperature sender on the engine, a Dakota Digital BIM01-1 may also be used with most 1996 or newer OBDII compliant computer systems to provide
an engine temperature reading. When using the BIM-01-1, select “BUS F” or “BUS C” for the
sender type.
The water temp sensor has two wires coming from the harness. The BLUE or RED wire
will connect to the WTR SND terminal, the BROWN or BLACK wire will connect to the WTR –.
Due to the construction of the sensor, readings at lower temperatures below 100 ºF may
be inaccurate. The sensor is designed to be accurate from approximately 100 ºF - 300 ºF.
WTR –
This is the ground reference used for 2-wire water temp sensors. This will connect to the
BROWN or BLACK wire from the Dakota Digital SEN-04-5. The BLUE or RED wire will connect
to the WTR SND terminal.
***DO NOT connect this terminal to any other devices
OIL +
This terminal is used to supply power to Dakota Digital pressure sensor SEN-03-8. This
supplies 5V DC to the sensor and should not be connected to anything else. Connect the RED
wire from the SEN-03-8 to this terminal.
***DO NOT use this terminal to power any other devices; it is a low current +5V output.
OIL SND
The oil pressure sender included with this system must be used. Other senders will
cause incorrect readings or damage to the control box.
The supplied sensor, Dakota Digital SEN-03-8, is a 0-100 psi solid state pressure sensor.
The sender can mount on the engine block or in an oil pressure line off of the block. The sender
has 1/8” NPT threads. The included adaptor bushings may be used to adapt it for various
applications.
The oil pressure sensor has three wires coming from the harness, plus one bare shield
wire. The WHITE wire will connect to the OIL SND terminal, the RED to OIL + (5V DC), and the
BLACK and bare shield wire to OIL –. Do not route the oil sender wire alongside a spark plug
wire or other high current or high voltage wires. Doing so can cause incorrect or erratic gauge
readings.
If the oil pressure drops below an adjustable warning point, the reading will flash as a low
oil pressure warning. The default warning point is 10 psi. If the oil display shows in a LCD
message screen as “ - - ”, this indicates that the control box is sensing an open circuit, a short to
ground, or out-of-range error from the sender or sender wire. If the oil display shows “EEE” this
indicates that the control box is sensing a short to power or out-of-range error from the sender. If
either indication remains on the display, inspect the sender wire for damage, check the routing of
the sender wire, check the sending unit grounding, and check that the correct sending unit is
connected.
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MAN 650314:D
OIL –
This is the ground reference used for three-wire pressure sensor. This will connect to the
black wire as well as the bare silver shield wire from the Dakota Digital SEN-03-8.
***The bare wire is the shield wire, connect this wire to the OIL – along with the BLACK
wire
***DO NOT connect this terminal to any other devices
FUEL +
This output is not typically used. It is a low current +12V supply for powering solid state
fuel sensors. Currently, it does not have an application for any Dakota Digital fuel level sensors.
***This terminal should not be used with a typical resistive type fuel sensor. For
most applications, leave this terminal open. Do not try to power other devices from this
terminal or damage to the control box will occur.
FUEL SND
The fuel gauge sending unit is not normally supplied because the display system can use
the existing fuel sending unit in the tank in many cases. The sending units that are compatible
with this system are as follows: GM, Ford, VDO, and Stewart Warner. It is also possible to
program a custom setting for senders that are not pre-programmed into the system.
Use the FUEL - and FUEL SND terminals and run a twisted pair of wires back to your fuel
level sensor. Connect the FUEL - terminal to the fuel level sensor body or a mounting screw to
insure the sensor is sufficiently grounded. The other wire is the sensor signal which goes to the
FUEL SND terminal.
If your wiring harness already has a single wire routed through the vehicle for the fuel
sender then it may be used. If using a wire from an existing harness, make sure that the wire
does not have power. The fuel sender gets power from the control box only. Fuel senders
reference their ground from the sender mounting plate.
The fuel sender type is selected using the fuel setup menu under “SENDER”. The settings
are discussed later in the setup section. Anytime the fuel level is below 10%, the reading will
flash as a warning of low fuel.
The fuel gauge will initially display “E” until the fuel sender type has been set, and a
message will be displayed that says to “set Fuel sender”. If the message display shows “ --%FUEL” this indicates that the control box is sensing a short to ground or out-of-range error from
the sender or sender wire. If the message display shows “EEE %FUEL” this indicates that the
control box is sensing an open circuit or out-of-range error from the sender. If either indication
remains on the display, inspect the sender wire for damage, check the routing of the sender wire,
check the sending unit grounding, and check that the sender selection is set correctly for the
sending unit that is connected.
FUEL –
Connect the FUEL - terminal to the fuel level sensor body or a mounting screw to insure
the sensor is sufficiently grounded. One terminal on the sensor is the signal which goes to the
FUEL SND terminal.
***For fuel level sensors that are attached to an electric fuel pump, or if you have an
electric fuel pump in the tank, make sure that the fuel pump is externally grounded to the
vehicle chassis. Attempting to ground the fuel pump to the Dakota Digital control box will
result in erratic operation and damage to the control box.
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MAN 650314:D
CRUISE (-)
The CRUISE terminal can be used as a “cruise engaged” indicator. The CRUISE input is
activated by a ground signal from a compatible cruise control harness. Whenever the CRUISE
input is grounded, the system will display a small green “cruise engage” indicator.
WAIT (+)
The WAIT terminal can be used as a “wait to start” or glow plug indicator. The WAIT input
is activated by a 12 volt signal from the glow plugs. Whenever the WAIT input is powered with
+12V, the system will display “WAIT” on the LCD1 message display. This message can be
cleared by pressing and holding SW1, or once the WAIT terminal loses the +12V signal.
GEAR (1 wire)
The GEAR terminal is used for the gear shift indicator. The indicator is built into every
system, but will not light up unless a Dakota Digital GSS-1000/2000/5000 gear shift sending unit
is connected or a Dakota Digital BIM-01-1 with a compatible electronic transmission is used,
telling the system what gear the transmission is in. The gear shift sending unit is not included
with the system and must be purchased separately if desired.
The GEAR terminal will connect to the FIRST terminal on a GSS-1000 or to the 1-WIRE
terminal on a GSS-2000 or GSS-5000. Follow the instructions in the GSS manual for use with a
single wire display system. When the gear shift sending unit is connected, the gear name will be
shown on the LCD1 message display.
NOTE: The system will automatically change to the gear display for a few seconds
whenever the gear position changes, even if viewing a different message display.
4x4 (-)
The 4x4 terminal can be used on four wheel drive vehicles. The 4x4 input is activated by a
ground signal from a switch on the transfer case. Connect a wire from this terminal to the switch
on the transfer case. Whenever the 4x4 input is grounded the system will briefly display “4x4
ON” on the LCD1 message display. When the signal turns off, the system will briefly display “4x4
off” on the message display.
RIGHT (+)
The RIGHT terminal is activated by a 12 volt signal from the turn signal flasher. When this
terminal has 12 volts, a green arrow will light up on the display face. An existing wire from the
vehicle for the right turn indicator can be used or a new wire can be connected from the turn
signal flasher or power wire feeding the right turn signal bulb.
LEFT (+)
The LEFT terminal is activated by a 12 volt signal from the turn signal flasher. When this
terminal has 12 volts, a green arrow will light up on the display face. An existing wire from the
vehicle for the left turn indicator can be used or a new wire can be connected from the turn signal
flasher or power wire feeding the left turn signal bulb.
HIGH (+)
The HIGH terminal is activated by a 12 volt signal from the headlight high beam wire.
When the terminal has 12 volts, a blue high beam indicator will light up on the display face. An
existing wire from the vehicle for the high beam indicator can be used or a new wire can be
connected from the high beam side of the hi/low beam switch.
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MAN 650314:D
BRAKE (-)
The BRAKE terminal can be used as a brake system warning indicator. The BRAKE input
is activated by a ground signal from the brake pressure switch on the master cylinder or from the
parking brake set switch. Connect a wire from this terminal to the pressure switch on the master
cylinder or consult a vehicle service manual to determine color and location of an existing wire.
Whenever the BRAKE input is grounded, the system will display “check BRAKE” on the LCD 1
message display. This message can be cleared by pressing and holding SW1. There is also a
red exclamation indicator that will illuminate on the display face when the terminal is grounded.
CHECK ENG (-)
The CHECK ENG terminal is used with fuel injection ECM’s to display engine problems
and trouble codes. The CHECK input is activated by a ground signal from the ECM. Whenever
the check input is grounded, the system will display “check ENGINE” on the LCD1 message
display. This message can be cleared by pressing and holding SW1. There is also a red check
engine indicator that will illuminate on the display face.
For certain ECM’s, when placed into diagnostic mode, trouble codes can be read by
counting the flashes of the check engine indicator. Consult a service manual for the fuel injection
system that you have for further information on trouble codes or if that is how your system
operates. With some ECM’s, a 12 volt light bulb may need to be connected in addition to the
CHECK input in order to provide proper current loading. Connect one wire from the bulb to keyed
power and the other to the CHECK input. In this case, both the bulb and our display system
indicator would come on when the check engine wire is “active”.
DIM
The backlights and needles in the VHX systems are designed to illuminate when the
headlights are turned on. Connect the DIM terminal to the taillight or parking light circuit so it has
12 volts whenever the headlights are on. When power is applied to the DIM terminal, the
instruments will illuminate at a preset brightness level. When the DIM terminal does not have
power, the backlighting will be off, unless they’re enabled in setup to be on in day time operation.
The night brightness level is adjustable two different ways. This preset brightness is
adjusted in the setup menu “LIGHTING”. See ADJ SND for a description of the second method.
AUX. I/O
This jack is used to connect bus expansion modules (BIM). Do not attempt to plug in any
other device to this jack or damage to the control box will occur. This connector should be left
open, unless using a Dakota Digital product designed for it. Operation is discussed with BIM
units purchased separately from Dakota Digital.
DISPLAY CABLE CONNECTION
This is where the network/CAT 5 cable from the display system plugs into the control box.
All three connectors are exactly the same output so it does not matter which one you choose to
use. Some systems may have two cables leading down from the system and you will need to
connect both cables, and it doesn’t matter which one. Unused jacks can be left open.
Some systems may also need a cable connecting the two halves or multiple gauges in the
system together. If the back of the displays have more than one connector you will need to
jumper it to the other display that has only one. The shorter cable supplied in the kit is for this
connection.
***If you are purchasing a longer network cable to connect the display system to the
control box please make sure to get a CAT 5, CAT5E, or CAT6 “patch cable” and NOT a
“cross over” cable.
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MAN 650314:D
SETTING UP THE CONTROL BOX
Below is the list of setup menus. You must have SW1 wired to enter setup, SW2 will be
used in some menus as well; descriptions of each menu are below. Pay close attention to
Setup menus and options as incorrect settings will cause faulty readings on the displays.
Main Menu
Sub Menu
Description____________________
SENDER (normal, bus)
AUTO
ADJUST
SERVICE (OFF, 500 – 7500)
OUTPUT (2k ppm, 4k PPm)
DONE
Select sensor type
Auto calibrate speed
Adjust the speed calibration
Select the service countdown
Select output speed signal PPM setting
Exit setup menu
ENGINE (bus, 1 – 16)
UPDATE (slow, mid, fast)
WARN (2200 – 14800)
SIGNAL (5V LOw, 12V HIGH)
DONE
Set engine cylinder count
Set RPM update rate
Set RPM shift warning point
Select RPM signal voltage level
Exit setup menu
WARNING (LOW 10.0 – 13.1)
DONE
Set low volt warning point
Exit setup menu
SENDER (DD F,DD C,BUS F, BUS C)
WARNING (150-300F / 65 -148c)
TEST
DONE
Select sensor type
Set high temp warning point
Display sensor ohm reading
Exit setup menu
WARN (LOW 5 – 36)
TEST
DONE
Set low pressure warning point
Display sensor voltage reading
Exit setup menu
SENDER (SW 33, CUSTOM,
GM 30, GM 90, GM 250,
F 10, F 150, V 180)
CUSTOM
TEST
DONE
Select sensor type
Calibrate custom fuel sensor
Display sensor ohm reading
Exit setup menu
DIM LEVEL (ADJUST 0-31)
DAY LEVEL (ADJUST 0-32)
DONE
Change preset night dimming
Change day time backlighting
Exit setup menu
SCAN
SETUP
DONE
Check/scan for connected modules
Enter setup (only when modules present)
Exit setup menu
INDICATORS
(LIGHT ONLY, LIGHT+LCD)
LOCATION (1, 2, 1+2, OFF)
DONE
Enable indicators on face and LCD
SPEED
TACH
VOLT
WATER
OIL
FUEL
LIGHTING
BIM
DISPLAYS
14
Select display location
Exit setup menu
MAN 650314:D
INFO
Current software code
Current pulse per mile cal value saved
Exit setup menu
VERSION
SPEED CAL
DONE
Used to preset odometer reading
Set ODOM
To enter the setup mode, press and hold SW1 while turning the key/ACC power on. The
display should light up and show SETUP on the speedometer/LCD1 and tachometer/LCD2
message displays. Release the switch and Setup SPEED should display on LCD1, this is the
start of the setup menus. Press and release Switch 1 (SW1) to advance through the main
menus. A press and hold will enter the sub menu. A press and hold is also used to save the
setting and jump to the next option, or exit a menu when DONE is displayed.
You can exit setup at any time by switching off the keyed power.
SPEEDOMETER SETUP/CALIBRATION
There are two main methods for calibrating the speedometer, Auto Cal and Adjust. Auto
Cal requires that you have one measured mile marked out. Adjust requires you to follow another
vehicle going at a set speed, use a handheld GPS with speedometer function, or time yourself
over a mile to determine your speed.
* It is simplest to start with the Auto Cal method to get the speedometer close. If you find
it’s reading too fast/slow after the Auto Cal, then attempt the Adjust mode.
Press and hold SW1, then turn the key on and start the engine. Once the engine is
running, release SW1. “SEt SPEED” should be displayed. Press and hold the switch until
“SPEED SENDER” is displayed to go into the speed setup menus, release SW1.
Now you can press and release the switch to scroll through the sub-menus, “sender”
“auto” “adjust” “Service” “output” “DONE”. When you get to the desired sub-menu, press
and hold the switch to select it.
Speed sensor setup (SENDER)
This menu is used to set the speed sensor input type. You can use the supplied pulse
generator or existing speed sensor for most applications. You can also read the speed signal with
the use of a bus interface module (BIM). Dakota Digital offers a BIM that will allow you to read
the speed signal from an ECU if you are installing the system in a vehicle equipped with the
OBDII port or a drive train from a newer vehicle; most 1996 and newer vehicles have this.
If you are using a Dakota Digital pulse generator or feeding an ECU signal into the SPD
SND terminal, this is considered a normal signal.
When “speed Sender” is displayed, press and hold SW1 until the message screen
changes.
Release SW1 and the current sender selection will be displayed.
Press and release SW1 to toggle between “normal” and “BUS”.
When the desired setting is displayed press and hold SW1 until “DONE” is displayed
Release the switch to go onto the next sub menu item.
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MAN 650314:D
Auto Cal (AUTO)
This menu is used to calibrate the speed signal by driving a measured mile. Start this
procedure with the vehicle stopped at the beginning of a known measured mile. Shut the car off,
press and hold SW1 and turn the key on and start the car then release the switch to get into
setup once the car is running. Then select the speed setup menus.
When “speed AUTO” is displayed press and hold SW1 until you get “SPD Pulses 0”
Release SW1 and the speed/LCD1 message display should read “SPD Pulses 0”, LCD2
will read “Setup”. The other gauges should display the current readings (tach, fuel,
volt, water, and oil). Stopped at the beginning of the measured mile, the “SPD Pulses
0” reading should stay at “0” until you start driving. If this is number is increasing while
stopped, you have something wired wrong or are picking up interference; please check
connections and wire routing before continuing or you will have incorrect readings later.
Begin driving the measured mile.
The “SPD Pulses x” reading should start to increase as you travel, indicating the pulses
received from the speed sensor or VSS. This is known as the pulses per mile (PPM).
The acceptable range for this is about 2,000 – 250,000.
Once you reach the end of the marked mile, or are passing the marker, press and release
SW1. The readings will zero out, then everything should move up to the correct values
and the speedometer should now be displaying your current speed.
Auto Cal is now complete and your speedometer should be reading correctly.
NOTES: You do not have to drive at a constant speed nor do you have to avoid stopping
during Auto Cal. When completed, you do not need to stop; you may, but you can also
just press and release SW1 as you pass the one mile mark.
The message display cannot be used to determine when the mile has been driven; it’s only
there as a reference to indicate pulses are coming into the control box. Even if you have
an 8,000 PPM sensor you may calibrate at 9xxx PPM (for example) due to gearing and tire
size.
Also be aware that the odometer is calculated from the speedometer cal value; if it is not
calibrated properly, the odometer reading could be higher/lower than actual.
***If you do not receive more than 2,000 pulses during calibration the unit will error out
and display a brief “pulse to low” message and revert to a default PPM setting.
Adjust Mode (ADJUST)
Adjust is slightly different depending on what your input signal is selected to in the
SENDER menu.
When “adjust” is displayed, press and hold SW1 until the message screen changes.
Release SW1.
If “normal” is selected for the sender type, it will allow you to adjust the signal that is
being supplied to the SPD SND terminal coming from a pulse generator or ECU. The fuel, volt,
oil, water, and tach will operate normally. The speedometer will show the speed reading and the
speed/LCD1 message display will say “xx ADJ MPH”. Begin driving at a known speed. Press
and hold SW1 to increase the speedometer reading, the next press and hold of SW1 will
decrease the speedometer reading. You can continue adjusting up and down as needed until the
reading is correct. When the speedometer is correct, stop and restart the system, by turning the
key/power off and then starting the vehicle back up. The new calibration will be saved when the
there is no switch press for eight seconds.
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MAN 650314:D
If “Bus” is selected for the sender type, the speed signal should be coming into the AUX
I/O port through the use of a BIM module. The adjustment ratio ranges from 75 – 125% on this
setting. It is assumed that the signal from the external device is the correct pulse rate, so there
are only provisions for slight adjustment. The LCD1 message will light up and show “adjust
spD xxx%”, XXX is adjustable from 75 – 125 and is the percentage the input is corrected by. If
set to 100 the signal is uncorrected and whatever the BIM module is reading is displayed on the
dash.
NOTES: For Adjust mode you can follow another vehicle, time yourself, or use a GPS as a
reference. A chassis dyno is another excellent way to use the Adjust mode.
Also be aware that the odometer is calculated from the speedometer cal value; if it is not
calibrated properly, odometer reading could be higher/lower than actual.
Service countdown meter (Service)
The service countdown meter allows you to set a distance value that will decrease as the
odometer increases. When the value gets to zero, a message “Service DUE” will appear on the
LCD1 message display on power up to remind you that service is due. This can be used for
routine maintenance reminders such as oil changes.
When “service” is displayed press and hold SW1 until the message screen changes.
Release the switch and the current service setting will be displayed.
Press and release SW1 to increase the value from “OFF” then “500”-“7500” in 500 mile
increments.
Once the desired setting is displayed, press and hold SW1 until “DONE” is displayed to
save the value.
Speed Output (OUTPUT)
If a speed signal is needed for an ECM or cruise control, the SPD OUT terminal can be
used. This terminal can supply a 2,000 ppm or 4,000 ppm signal. If a BIM-01-1 is used to supply
the speedometer reading, this output is not available.
When “output” is displayed press and hold SW1 until the message screen changes.
Release the switch. The current PPM output will be displayed.
Press and release SW1 to toggle from “2k PPM” or “ 4k PPM”.
When the desired setting is displayed, press and hold SW1 until “DONE” is displayed.
Release the switch to go on to the next menu item.
Exit setup (done)
This will allow you to exit the speed setup and go on to the next setup menu.
When “speed done” is displayed, press and hold SW1 until you get “DONE”
Release the switch to go on to the next menu
TACHOMETER SETUP
The control box can be set to read from 1-16 cylinder ignition signals. It can also be set to
read either 12 volt tach signals or 5 volt tach signals found on some engine computers. The
digital tachometer update rate can be adjusted between slow, mid, and fast. The RPM
warning/shift point can be adjusted from 2,200 – 14,800. The digital tachometer will read from
300 – 17,500 RPM, at RPM’s above 9,990 the reading will be displayed as RPMx10 in the
message center (12,000 RPM displays as 1,200).
You can also read the tach signal with the use of a bus interface module (BIM). Dakota
Digital offers the BIM-01-1 that will allow you to read the RPM from an ECU if you are installing
the system in a vehicle equipped with the OBDII diagnostic port or a drive train from a newer
vehicle. Most 1996 and newer vehicles have this.
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MAN 650314:D
Press and hold SW1 while turning the key on. Release the switch. Press and release
SW1 to get to the “TACH” setup menu. Press and hold the switch until “TACH ENGINE” is
displayed to enter the tach setup menus, then release SW1.
Now you can press and release the switch to scroll through the tach sub-menus, “ENGINE”
“UPDATE” “WARN” “SIGNAL” “DONE”. When you get to the desired sub-menu, press and hold the
switch to select it.
Engine cylinder setup (ENGINE)
This menu is used to set the cylinder count of the tach signal. It is adjustable from 1 -16
cylinders.
When “setup engine” is displayed, press and hold SW1 until the message screen
changes.
Release SW1 and the current cylinder setting will be displayed.
Press and release SW1 to increase the value from “ 1” – “ 16” or “BUS”.
When the desired setting is displayed, press and hold SW1 until “DONE” is displayed.
Release the switch to go onto the next sub-menu item.
*NOTE: When selecting the cylinder count, be aware of tach signals coming from ECMs,
oftentimes a V-8 engine computer may actually output a 4 cylinder tach signal. This would
require the ENGINE selection to be set for “ 4 ” not “ 8 ” as you might expect.
Display update setup (UPDATE)
The display update rate can be adjusted so the reading on the tachometer doesn’t change
so quickly. This is a personal preference and is used to “slow” the reading by averaging. The
value can be changed from slow, mid, or fast.
When “UPDATE” is displayed, press and hold SW1 to enter the “UPDATE”” setup menu.
Release SW1 and the current update rate will be displayed.
Press and release SW1 to increase the value from “SLOW” “MID” or “FAST”.
When the desired setting is displayed press and hold SW1 until “DONE” is displayed.
Release the switch to go on to the next sub-menu item.
RPM warning setup (WARN)
This is used for the turn on point for the WARN output on the control box. When the RPM
reading is above this setting, the output will activate, providing a ground signal. It can be used to
turn on a shift light or other RPM based devices. The value is adjustable from 2,200 RPM –
14,800 RPM in 100 RPM increments.
When “WARN” is displayed, press and hold SW1 to enter the “WARN”” setup menu.
Release SW1 and the current warning point will be displayed.
Press and release SW1 to increase the value from “2200” – “14800”..
When the desired setting is displayed press and hold SW1 until “DONE” is displayed.
Release the switch to go onto the next sub-menu item.
Tach signal setup (SIGNAL)
This menu will allow you to select from two different tach-input types. A low voltage, “5V
LO”, tach signal or a high voltage tach signal, “12V HIgh”. A low voltage signal is usually one
picked up from the ECM. Low voltage may also be considered a 0-5V square wave. If you are
getting the tach signal from the ignition coil or points, set this for the high voltage signal “12V
HIgh”. To pick up a tach signal from a traditional ignition coil, connect a signal wire to the
negative side of the coil.
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MAN 650314:D
When “SIGNAL” is displayed, press and hold SW1 to enter the “SIGNAL” setup menu.
Release SW1 and the current setting will be displayed.
Press and release SW1 to toggle from “12V HIGH” to “5V LOW”.
When the desired setting is displayed, press and hold SW1 until “DONE” is displayed.
Release the switch to go on to the next sub-menu item.
Exit tach setup (DONE)
This will allow you to exit the tach setup and go on to the next setup menu.
When “TACH DONE” is displayed, press and hold SW1 until “DONE” is displayed
Release the switch to go on to the next menu.
VOLT SETUP
The Volt setup allows you to set a warning point that will cause the message display to
flash the voltage reading in the message display whenever the value drops below the warning
point. The low voltage point can be set from 10 -13.1 volts. There is only one thing to set in the
volt sub-menu; either “WARNING” or “DONE” will be displayed.
Press and hold SW1 while turning the key on. Release the switch. Press and release
SW1 to get to the “volt” setup menu. Press and hold the switch until “volt warning” is
displayed to enter the volt setup menus, then release SW1.
When “WARNING” is displayed, press and hold SW1 until you see “VOLT WARN LOW”
followed by a number. Release SW1; this is the current voltage warning point.
Press and release SW1 to increase the value from “10.0” – “13.1”.
When the desired setting is displayed, press and hold SW1 until “DONE” is displayed.
Release the switch to go onto “VOLT DONE” Press and hold SW1 to exit “VOLT” setup
menu.
WATER TEMP SETUP
The Water Temp setup allows you to select the units the temperature is displayed in,
Fahrenheit or Celsius. It also allows you to set a high temperature warning point that will cause
the message display to flash the water temperature reading whenever the value is higher than the
set point. There is also a test mode that will display the resistance for the sensor for trouble
shooting assistance.
Press and hold SW1 while turning the key on. Release the switch. Press and release
SW1 to get to the “water” setup menu. Press and hold the switch until “water sender” is
displayed to enter the water setup menus, then release SW1.
Now you can press and release the switch to scroll through the water sub-menus,
“SENDER” “WARNing” “test” “DONE”. When you get to the desired sub-menu press and hold the
switch to select it.
Temp sensor setup (SENDER)
This menu is used to set the temp sensor type. Dakota Digital only offers one temp sensor
for this system, it is SEN-04-5, 100-300 F(40-150 C), 1/8” NPT threads. You can use bushings to
adapt the sensor to various locations. You will select “DD F” to read in Fahrenheit, or select “DD
C” to read in Celsius.
You can also read the temp with the use of a bus interface module (BIM). Dakota Digital
offers the BIM-01-1 that will allow you to read the engine temp signal from an ECU if you are
installing the system in a vehicle equipped with an OBDII diagnostic port or a drive train from a
newer vehicle. Most 1996 and newer vehicles have this. You will select “BUS F” to read in
Fahrenheit, or select “BUS C” to read in Celsius.
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MAN 650314:D
*NOTE: Selecting Celsius units will only change the reading on the LCD message centers
since the VHX needle sweeps are set for Imperial units. You will also need to enable the
message in order to display it.
When “sender” is displayed, press and hold SW1 until the message changes.
Release SW1 and the current sensor selection will be displayed.
Press and release SW1 to scroll through the sensor options “DD F” “DD C” “BUS F”
“BUS C”.
When the desired setting is displayed, press and hold SW1 until “DONE” is displayed.
Release the switch to go on to the next sub- menu item.
Temp warning setup (Warning)
This menu will allow you to select the high temperature warning point. When the display
value is higher than this point, a high temp warning message will flash the current water temp in
the LCD1 display. The value is adjustable from 150 – 300 F (65-148 C).
When “Warning” is displayed, press and hold SW1 until the message changes.
Release SW1 and the current warning point will be displayed.
Press and release SW1 to increase the value from “HI 150F” – “HI 300F”.
When the desired value is displayed, press and hold SW1 until “DONE” is displayed.
Release the switch to go on to the next sub-menu item.
Temp sensor test (test)
This menu will allow you to check the resistance the control box is reading from the water
temp sensor. This can be used for a diagnostic tool if you are having trouble or feel that the
reading is incorrect. For the Dakota Digital SEN-04-5 the resistance decreases as temperature
increases. Typical values for the Dakota Digital SEN-04-5 sensor are:
100F - 500 ohms
200F - 75 ohms
300F - 19 ohms
If the message display is showing “EEE” this is an open connection or no sensor connected. If it
is reading “ ---” this is indication of a short.
When “water test” is displayed, press and hold SW1 until the message screen
changes.
Release SW1 and the current resistance from the fuel level sensor will be displayed as
“test temp” “xxx ohms” where xxx is the resistance seen at the control box.
Press and release SW1 to scroll to other sensor inputs if you wish “oil” “Fuel” “temp”.
Once complete, hold SW1 until “DONE” is displayed.
Release the switch to go on to the next sub-menu item.
Exit water temp setup (done)
This will allow you to exit the water temp setup and go on to the next setup menu.
When “water done” is displayed, press and hold SW1 until you get “DONE”.
Release the switch to go onto the next menu.
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MAN 650314:D
OIL PRESSURE SETUP
Dakota Digital only offers one pressure sensor for this system, SEN-03-8, 0-100 psi solid
state sensor with 1/8” NPT threads. The Oil Pressure setup allows you to set up a low pressure
warning point that will cause the message display to flash the oil pressure reading whenever the
value is lower than the warning set point. There is also a test mode that will display the voltage
from the sensor for trouble shooting assistance.
Press and hold SW1 while turning the key on. Release the switch. Press and release
SW1 to enter the “Setup oIL” menu. Press and hold the switch until “oil warn” is displayed to
enter the oil pressure setup menus, then release SW1.
Now you can press and release the SW1 to scroll through the oil sub-menus, “WARN”
“test” “DONE”. When you get to the desired sub-menu, press and hold the switch to select it.
Oil pressure warning setup (WARN)
This menu will allow you to select the low pressure warning point. When the display value
is lower than this point, the oil pressure will display and flash in the LCD1 message center. The
value is adjustable from 5 – 36 psi.
When “Oil WARN” is displayed, press and hold SW1 until the message screen changes
Release SW1, and the current warning point will be displayed as “oil warn low xx”
where “xx” is the current warning point.
Press and release SW1 to change the value from “LOw 05” – “low 36”
When the desired value is displayed press and hold SW1 until “DONE” is displayed.
Release the switch to go on to the next menu item.
Oil pressure sensor test (test)
This menu will allow you to check the voltage the control box is reading from the pressure
sensor. This can be used for a diagnostic tool if you are having trouble or feel that the reading is
incorrect. For the Dakota Digital SEN-03-8, 0-100 psi sensor, the voltage increases with
pressure. At 0 psi, the voltage should be close to 0.5V and at 100 psi the voltage should be close
to 4.5V.
When “oil test” is displayed press and hold SW1 until the message screen changes
Release SW1 and the current voltage from the oil pressure sensor will be displayed as
“test oil x.x volts” where x.x is the voltage seen at the control box.
Press and release SW1 to scroll to other sensor inputs if you wish “Fuel” “temp” “oil”
Once complete, hold SW1 until “DONE” is displayed.
Release the switch to go onto the next sub-menu item.
Exit oil pressure setup (done)
This will allow you to exit the oil pressure setup and go on to the next setup menu.
When “oil done” is displayed, press and hold SW1 until you get “DONE”.
Release the switch to go on to the next menu.
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FUEL SETUP
The control box can read seven common fuel level sender resistance values. If your
sender is not shown in the table below, the system can be programmed to read a custom sender.
The table below shows the seven pre-programmed senders and their respective empty and full
resistance values.
Sender type
Menu
Empty R
Full R
GM 30
GM 0-30 ohm (mid 60’s-earlier)
0 ohms
30 ohms
GM 90
GM 0-90 ohm (mid 60’s-late 90’s)
0 ohms
90 ohms
GM 250
GM 40-250 ohm (late 90’s-later)
40 ohms
249 ohms
F 10
FORD 73-10 ohm (earlier -late 80’s)
73 ohms
10 ohms
F 150
FORD 20-150 ohm (late 80’s-later)
20 ohms
150 ohms
V 180
VDO 10-180 ohm
10 ohms
180 ohms
SW 33
SW/SUN 240-33
240 ohms
33 ohms
CUSTOM User settable User settable
User programmed
To get into the fuel setup menus, start with the key off.
Press and hold SW1 while turning the key on, then release SW1.
Press and release SW1 to scroll though the setup menus until you get to “setup fuel”.
When “setup fuel” is displayed, press and hold SW1 until “fuel sender” is displayed, then
release SW1.
This is the start of the fuel setup menus, now make your selection between “SENDER” “custom”
“test” or “done”. When you get to the desired sub-menu, press and hold the switch to select it.
Fuel sensor setup (fuel sender)
This menu is used to select the fuel level sensor type. The table above shows the seven
options and resistance ranges as well as the custom option.
When “fuel sender” is displayed, press and hold SW1 until you get “sender xx xx”
where “xx xx” is the current sensor it is set to.
Release SW1, and the current sensor selection is displayed.
Press and release SW1 to scroll through the sensor options “gm 30” “gm 90” “GM 250”
“f 10” “f 150” “v 180” “sw 33” “custom”
When the desired setting is displayed, press and hold SW1 until “DONE” is displayed.
Release the switch to go onto the next menu item.
Note: You must calibrate the custom sensor curve to your specific fuel sensor. If you are
selecting the Custom setting, follow the steps below to save your sensor’s resistance
curve.
Custom fuel sender curve setup (custom
custom)
custom
You will need to have the sender out of the tank, or begin with the tank empty and
add fuel during the custom fuel sender setup.
*** The factory default custom curve is 110 empty and 5 ohms full
***You must select “custom” in the Fuel Sender menu after you have calibrated the custom
curve so the system knows that you want to use it.
When “CUSTOM” is displayed press and hold SW1 until the message screen changes.
The message display will show “custom --%” and “xxx OHMS”, release SW1.
The message display will show “custom 00%” and “xxx OHMS”, where xxx is the current
resistance the control box is seeing from the fuel sensor. You should be able to move
the float up and down at this point and see the resistance values follow the curve of
your sensor.
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Now, with the float in the empty position, press and release SW1.
The message display will show “custom 33%” and “xxx OHMS”. Move the float to 1/3 full
and then press and release SW1.
The message display will show “custom 66%” and “xxx OHMS”. Move the float to 2/3 full
and then press and release SW1.
The message display will show “custom 99%” and “xxx OHMS”. Move the float to the full
position and then press and release SW1. The new sender is now stored under the
“CUSTOM
CUSTOM”
CUSTOM sender selection.
The message display will be back in the fuel sub-menu showing “FUEL test”.
***If the resistances recorded during custom calibration are not in sequence you will get a
“FAIL” message at the end of calibration. No values will be saved and calibration must be
started again. Make sure the resistance of the sensor is linear from empty to full.
Note: Once the custom sender is programmed, go back and ensure that “custom” is
selected in the “FUEL SENDER”
SENDER” menu. Programming the custom sender curve does not
automatically make it the ‘active’ sender.
Fuel sensor test (TEST)
This menu will allow you to check the resistance the control box is reading from the fuel
level sensor. This can be used as a diagnostic tool if you are having trouble or feel that the
reading is incorrect. You can use the table of fuel sensors above to get an idea on the resistance
you should be seeing.
When “FUEL test” is displayed, press and hold SW1 until the message screen changes.
Release SW1 and the current resistance from the fuel level sensor will be displayed as
“test fuel” “xxx ohms” where xxx is the resistance seen at the control box.
Press and release SW1 to scroll to other sensor inputs if you wish “temp” “oil” “Fuel”.
Once complete, hold SW1 until “DONE” is displayed.
Release the switch to go onto the next sub-menu item.
Note: Fuel level sensors are generally not precise; in the test function you should expect to see
some error. For instance a GM 0-90 sensor may display 5 ohms empty and 97 ohms full. If you are
within 10% of the values in the table, this is considered within specification.
Exit fuel setup (done)
This will allow you to exit the fuel setup and go on to the next setup menu.
When “fuel done” is displayed, press and hold SW1 until “DONE” is displayed
Release the switch to go on to the next menu.
LIGHTING SETUP
The lighting menu, “LIGHTING”, allows you to set the backlight brightness level for the
LCD message centers under daytime viewing conditions. You can also adjust the level the
backlights will turn on to when the DIM terminal has power applied to it for night time viewing.
You can even enable the back lights during the day if you wish so that the tic marks and needles
are always lit.
If you are using the separately purchased DIM-1 kit from Dakota Digital, the dim brightness
level doesn’t matter; when the DIM terminal has power applied to it, you have total control of the
night brightness level with the twist of a knob. If the DIM-1 is wired to the ADJ SND and ADJ –
terminals, the dim setting will be overridden by the DIM-1 knob.
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MAN 650314:D
To set the level of brightness for night time driving:
Press and hold SW1 while turning the key on. Release the switch.
Press and release SW1 to get to the “LIGHTING” setup menu.
Press and hold the switch until “LIGHTING DIM LEVEL” is displayed, then release SW1.
Press and hold SW1 to enter brightness adjustment until a screen that says “dim level
adjust --", then release the switch.
A screen that reads “dim level adjust xx” should be displayed, where xx is the
current level.
Press and release SW1 to select desired “night time” brightness for the gauges. The
number is adjustable from 0 (off) to 31 (full brightness). Whenever the DIM terminal
has 12V applied to it, the back lights will turn on to this level.
Next; press and release SW2 to save setting. Yes you have to use SW2 to save.
To set the level of brightness for day time driving:
Once in setup and in the “LIGHTING” setup menu, Press and release SW1 until
“LIGHTING day LEVEL” is displayed
Press and hold SW1 to enter the day time brightness adjustment until a screen that says
“day level adjust --" is displayed, then release the switch
A screen that reads “day level adjust xx”, where xx is the current level, should be
displayed.
Press and release SW1 to select desired brightness for gauges, the number is adjustable
from 0 (all off) to 32 (LCD only) and then full backlight diming from 31- 01. Setting this
to a number other than 0 will turn on the back lights even when the DIM terminal isn’t
powered, Setting to 32 will only enable the LCD message backlights.
Next press and release SW2 to save setting. Yes you have to use SW2 to save.
Exit lighting setup (done)
This will allow you to exit the lighting setup menus and go on to the next setup menu.
When “lighting done” is displayed press and hold SW1 until “DONE” is displayed
Release the switch to go on to the next menu.
BUS INTERFACE MODULE SETUP
The bus interface modules (BIM) are an add-on product to Dakota Digital instrumentation
systems. They allow you to add auxiliary gauge functions, such as fuel pressure, vac/boost,
trans temp, etc., right into the system without having to add additional gauges. By default, all of
the BIM readings are displayed on the tachometer/LCD2 message display where the tachometer
and other performance readings are currently displayed. Switch 2 (SW2) is used to cycle through
the various message screens.
More detailed instructions are supplied with the BIM units.
DISPLAY SETUP MENU
The VHX system allows for complete user adjustability, this includes allowing you to
decide which reading you would like to display in the LCD message centers and which one you
want it to display in. Various readings can be turned on or off, allowing you scroll though the
message screens quicker, if desired, in normal operation. You can also enable a second set of
indicators for turn signals, high beam, and cruise so they are seen more easily in two places on
the dash, in the face and in the message center.
Press and hold SW1 while turning the key on. Release the switch. Press and release
SW1 to get to the “setup displays” menu. Press and hold the SW1 until the message
changes, then release SW1.
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MAN 650314:D
Secondary indicator setup (indicators)
This menu will allow you to select where the indicators are displayed and if you want them
shown in the face of the system, light only, or if you would like them also displayed in the LCD1
message center as well as the face so they are more visible in two locations.
When “displays indicators” is displayed, press and hold SW1 until the message
screen changes
Release SW1, and the current setting will be displayed as “indicators” “Light only”
or “Light + LCD”
Press and release SW1 to change the value from “Light only” which only displays the
indicators for turn signal, high beam, and cruise in the indicator light on the gauge face,
or “Light + LCD” that enables a secondary set of indicators in the LCD1 message
screen.
When the desired value is displayed, press and hold SW1 until “DONE” is displayed
Release the switch to go on to the next menu item.
Display message location (location)
This menu will allow you to select which LCD message center you want to display the
various readings on. You can select LCD1 (1), LCD2 (2), or both LCD1 and LCD2 (1+2) or shut
the reading off by selecting OFF.
When “displays location” is displayed, press and hold SW1 until the message screen
changes.
Release the switch, and the message screen will read “Scanning… ch xx” it is looking
for any additional messages that would need to be displayed from any attached BIM
modules.
Once scanning is complete the LCD message screens should be lit with the messages
“LCD1” and “LCD2” on the screens. This is to provide a reference of which LCD is
which screen. Once you start selecting display options, selecting “1” will only show on
LCD1, selecting “2” will only display on LCD2. You can also select both or none.
Press and release SW1; the screen will change and show any BIM channels first.
If no BIM modules are connected the display should read “odometer 1” by default. This
would mean that the odometer reading will be displayed on LCD1.
To make a change to the channel, press and hold SW1 until the LCD display number
starts to flash, then release SW1.
Press and release SW1 to change the number from “1” “1+2” “2” or “off”.
Once at the desired number press and hold SW1 until the display number stops flashing to
save the setting, then release the switch.
Press and release the SW1 to go to the next message, continue on through all messages
selecting which screen you want to display on or disable readings that you don’t
care to view by selecting “off”.
When “location done” is displayed, this is the end of the location menu. Press and hold
SW1 until “done” is displayed to exit and return to the setup menu.
NOTE: In normal operation you have to use Switch 1 (SW1) to scroll through all of the
LCD1 message screens. You will use Switch 2 (SW2) to scroll through all of the LCD2
message screens. A press and hold of the appropriate switch will zero or reset the current
reading, if it can be reset, such as trip counters and various performance timers.
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MAN 650314:D
INFORMATION MENU
The information menu, “INFO” is used to display software code information should you
have any troubles; this information can be useful for troubleshooting as well as verifying the
current speedometer calibration value if using the normal speed input (SPD SND).
To view the version of software your instrument system has, press and hold SW1 while
turning the key on. Release the switch. Press and release SW1 to get to the “INFO” setup menu.
Press and hold SW1 to enter menu. VERSION should be the first option, press and hold SW1 to
view version of software your instrument system has.
The version screen should be displayed as
C VX01.00x(this line is the controller)
D VH01.00x(this line is the display)
Press and release SW1 to exit back to the “INFO” menus.
To view the current pulse per mile (PPM) setting, press and hold the SW1 when “SPEED CAL” is
displayed. The message screen should show “speed cal xxxx” where xxxx is the current
PPM setting/calibration value.
Press and release SW1 to exit back to the “INFO” setup menu.
When “Info done” is displayed, press and hold SW1 until “done” is displayed then release the
switch to get back to the main setup menu.
ODOMETER PRESET MENU
The control box will allow you to set the odometer miles to match your current odometer
reading, ONE time within the first 100 miles. Once the odometer has more than 100 miles,
this menu option will no longer be displayed. Make sure you have correctly calibrated
your speedometer so you don’t have to worry about racking up too many extra miles.
Once you have preset the miles, you cannot change it again without sending the control
box back to the factory.
WARNING!!: This only allows setting odometer to the nearest mile. Do not use tenths! For
example an odometer reading of 65432.1 should be set to “065432” using this method. If
the tenths digit is used, the odometer will read 10 times too high.
Press and hold SW1 while turning the key on. Release the switch. Press and release SW1 to
get to the “SET odom” setup menu. Press and hold SW1 until “set odo mi” is displayed to
enter the odometer setup menu, then release SW1.
The current miles will be displayed with the left most digit flashing.
Press and release SW1 to increment the digit. Press and hold the switch to move to the next digit
to the right.
Continue on with a press and release to increment and a press and hold to advance until the right
most digit has been set.
Press and hold SW1 and the speed display will show “xxxxxx MI save? NO”, release the
switch.
If the value is incorrect press and hold the switch while “ no” is displayed to go back and change
the odometer miles or turn the key off to cancel any changes.
If the value is correct press and release the switch to change to “xxxxxx MI save? YES”
Press and hold the switch while “yes” is displayed to save the current odometer reading and
return to the setup menus.
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MAN 650314:D
LCD MESSAGE CONTRAST ADJUSTMENT MENU
In some cases, mainly in systems where the message center would be mounted further
apart from one another or at different angles in the dash, you may want to adjust the contrast of
the LCD for better visibility. By default the contrast is set about midway and this setting should
be acceptable for most applications, but you can change it for individual preference.
The contrast menu is a hidden menu since it typically shouldn’t need adjustment, to get to
the menu:
Press and hold SW1 while turning the key on. Release the switch.
The LCD1 message should display “setup speed” and the LCD2 message should read “setup”
To access the hidden contrast menu, press and hold SW2 until “contrast adjust” appears on
both LCD screens, then release SW2.
Now if you press and hold SW1 a contrast bar will display and the contrast will change while the
switch is held, the next press and hold of SW1 will decrease the value. You can continue with
the press and hold and release to scroll up and down and adjust the contrast to your liking.
Once happy with the setting; release the switch and the screen will go back to “contrast
adjust” after there is no switch press for about three seconds.
If you have two LCD message centers use SW2 to adjust the contrast on LCD2 following the
same method as above.
After no switch presses for about ten seconds, contrast adjust mode will be exited and you will be
returned to the next main setup menu. If you are unhappy with the contrast, simply press and
hold SW2 to access the menu again from any one of the main setup menu screens.
NORMAL OPERATION AND FUNCTION
Here we will describe the common functions and “normal” operation of the VHX system.
Please follow the wiring and setup instructions to insure you have your system calibrated and
connected properly for your application. Avoiding setup or selecting incorrect options as that will
cause the gauge readings to be incorrect.
All of the VHX systems have the obvious gauge sweeps, but the biggest difference
between the VHX series and other analog style gauges are the information or message displays.
Each VHX system has two message displays, although some systems may have one large
display. Display 1 is typically in the speedometer gauge or under it in dual display systems and
Display 2 is usually under the tachometer. For systems with a larger single display message
center, the top half of the large display is considered Display 1 and the bottom half Display 2.
The message displays can display a wealth of auxiliary information as well as warning messages
and even 16 additional channels with the use of the separately purchased BIM units, bus
interface modules.
You must wire the momentary push button switches in order to access the different
message screens. The message displays are accessed using the supplied push-button switches.
Switch 1 (SW1) will toggle between the speed/LCD1 message displays and Switch 2 (SW2) will
toggle between the tach/LCD2 message displays. The switches must be wired to access setup
menus. It is recommended that you mount them in a spot easily accessible while viewing the
displays and gauges.
By default the available messages for each message display are:
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MAN 650314:D
Speed/LCD1 message displays
ODOMETER
A MILES
B MILES
KM/H
GEAR (with optional GSS-2000)
SERVIC (when enabled)
ENGINE
BRAKE
4W DRV
WAIT
DESCRIPTION
.
Odometer reading (0-999,999)
Trip A odometer reading (0-9999.9)
Trip B odometer reading (0-9999.9)
Alternate speed unit conversion
Gear shift position indicator
Distance to next service (0-9,999, or ---- when past due)
Check Engine indicator
Brake Warning indicator
4 Wheel Drive indication
Diesel Wait To Start indicator
NOTE: In normal operation you have to use Switch 1 (SW1) to reset trip meters, and
service counter. A press and hold will zero the current reading, if it can be reset. A press
and hold will also clear warning messages such as ENGINE, BRAKE, etc.
Tach/LCD2 Message displays
CLOCK
HOURS
HI SPEED
0-60 MPH
1/4¼ MI SPD
1/4 MI TIME
RPM
HIGH RPM
DESCRIPTION
.
12 hour clock display (press and hold switch to set)
Hours system has been on with tach signal (0-999.9)
High speed recall (0-255)
0-60 mph time in seconds (0-25.5)
Vehicle speed at end of ¼ mile (trap speed)
Time to travel ¼ mile from standing start
Digital tach readout on message display
High RPM recall (0-18,000)
BIM displays (optional)
BIM messages will display on Display 2 display by default
NOTE: A press and hold of SW2 will zero the current reading, if it can be reset.
Also, press and hold of the switch while the clock is displayed will enter clock set mode.
If you have the system powered up in normal mode you can scroll through the various
display screens with the press and release of the switches, SW1 or SW2. Whatever screen you
were on last will be recalled at the next power up. You can also select which screen you want
certain messages to appear on or if you want them displayed at all (covered under display setup).
If a warning limit or a change is sensed, the display screen may switch to that screen as a
warning indicator if it isn’t already being displayed. This is also true for systems that have the
optional gear position sensor installed; if the gear message isn’t displayed, whenever there is a
gear change the current gear screen will pop-up to indicate the gear change and after about three
seconds, revert back to the previous displayed message.
SETTING TIME ON CLOCK
When one of the screens is displaying the clock, press and hold the switch (SW1 if on
LCD1, or SW2 if on LCD2). The hours will begin flashing. Press and release the switch to change
the hour. Press and hold the switch to save hours. Tens of minutes will flash.
Press and release the switch to change tens of minutes. Press and hold to move on to
single minutes. Single minutes will flash.
Press and release the switch to change single minutes. Press and hold the switch to return
to normal operation.
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MAN 650314:D
TROUBLESHOOTING GUIDE
This is a list of some problems and their solutions which may be encountered when installing your
instrumentation system. If you cannot determine what the problem is or how to solve it, please call our
technical assistance line (605) 332-6513 or email dakotasupport@dakotadigital.com.
* A note on vehicle grounding *
The most common cause of problems with electric gauges and other sensitive vehicle electronics
is poor ground connections. The engine block has the highest ground currents of any point in the vehicle.
The ignition system, electric gauge senders, starter, alternator, etc. all use the engine block for a ground
point. Since the alternator is grounded directly to the engine block, all ground currents in the entire vehicle
must pass through the engine block while the engine is running. A weak or loose connection can cause
many unexpected problems that may be difficult to track down. The engine block should have heavy
ground straps to both the chassis and the body. The main negative cable from the battery should be
connected directly to the engine block.
Symptom
Possible Problem
Solution
----------------------------------------------------------------------------------------------------------------------------------System does not turn on
Control box may not be getting
Check if the control box always has
and status LED is off.
power.
12 volts connected to it’s constant
power terminal and 12v to ACC power
terminal when the key is on.
Control box may not be getting
Check if the control box has
a ground.
a proper ground connection.
Do not use a battery charger to
power the system.
The control box may have
Contact Dakota Digital’s service
an internal problem
department with a description of
the problem.
System does not turn on
and LED flashes once
every 4 seconds.
Constant power connected but
no ignition signal at ACC power
terminal.
Check connection at ACC power
terminal. There should be 12v when
key is on, and 0v when key is off.
System does not turn on
and LED is on steady.
Control box may be getting too
low of a voltage.
Check if power to control box is
at least 11 volts.
Do not use a battery charger to
power the system.
System does not turn on
and LED is flashing.
The display system may not be
getting power.
Check the patch cable between the
display system and control box.
Be sure the connectors are plugged in
control box and display securely.
Check the display system wiring
harness for broken or cut wires.
The tachometer will not
show a reading.
The control box is not connected
to the engine properly
Make sure the control box is
connected to your particular
ignition system properly.
Check the connections at both
ends of the wire.
Refer to the tach setup section
of the installation manual.
Refer to the tach setup section
of the installation manual.
The tachometer signal wire is
loose or broken.
The engine cylinder setting is
incorrect.
The tach signal setting is
incorrect.
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MAN 650314:D
Symptom
Possible Problem
Solution
----------------------------------------------------------------------------------------------------------------------------------The tachometer reading
The tachometer signal wire is
Check the connections at both
is incorrect.
loose or broken.
ends of the wire.
The engine cylinder setting is
Refer to the “Tach Setup” section
incorrect.
of the installation manual.
The speedometer will
not show a reading.
The speed signal is not
connected to the control box
properly.
The speed signal being used is
not compatible with the control
box.
The speed sending unit is not
connected to the transmission
properly.
The sending unit wire is picking
up noise from nearby wires.
Check that all speed sending
unit wires are connected to the
control box properly.
Use the speed sending unit
supplied with the display
system.
Check that sender is mounted
properly.
Check that transmission has the
appropriate internal parts.
Isolate the sending unit wire from
motor and ignition wires.
The speedometer is reading The speedometer is not calibrated. Refer to the “Speed Calibration”
too fast or too slow.
section of the installation manual.
With the engine running and A tachometer wire is too close to
Reroute or isolate the tachometer
the vehicle sitting still, the
to the speed signal wire.
wire away from the speed wire.
speedometer reads higher There is a ground problem between Make certain the ground wire for
than zero.
the speed sensor and the control
the speed sensor is connected
box.
directly to the control box ground.
A display shows “EE”
Sending unit for that gauge
is not connected to the control
box.
A display shows “- -”
The sending unit wire for that
gauge is shorted to ground.
Sending unit for that gauge
is not connected to the control
box.
Fuel displays “ ? ”
and gauge stays at
empty.
Check the wire from sending unit
to the control box for breaks.
Make sure that the sending unit is
wired to the correct terminal.
Sending unit is not getting
Make sure the sending unit is
grounded.
grounded properly at the control box.
On the water or oil, the sending
Use the water and oil senders that
unit is not the correct type.
were supplied with the system.
On the fuel, the control box may be Refer to “Fuel Setup” section of the
set for the wrong fuel sender.
installation manual to ensure that
the settings match your fuel sender.
The control box is set to an invalid
fuel sender setting.
30
Repair or replace shorted wire.
Check the wire from sending unit
to the control box for breaks.
Make sure that the sending unit is
wired to the correct terminal.
Refer to “Fuel Setup”
section of the installation manual
to ensure that the settings match
your fuel sender.
MAN 650314:D
Symptom
Possible Problem
Solution
----------------------------------------------------------------------------------------------------------------------------------The fuel gauge reads
backwards, incorrectly,
or does not change.
The control box may be set for
the wrong type of fuel sender.
The fuel sender may not be
connected to the control box
properly.
The fuel sender may not be
operating properly.
The fuel sender may have a
non-standard resistance
range.
Refer to “Fuel Setup”
section of the installation manual
to ensure that the settings match
your fuel sender.
Check the connections at both
ends of the fuel sender wire.
Make sure the fuel sender is
grounded properly.
Check the fuel sending unit with
an electrical multi-meter.
Use the custom fuel sender setup.
See the Fuel Setup section of the
manual for instructions.
The oil or water reading
is incorrect.
The sending units are not grounded Make sure wires are in correct terminals.
at the control box.
The sending unit wire is picking
Isolate the sending unit wire from
up noise from nearby wires.
motor and ignition wires.
The sending unit is not
Use the sending unit provided with
compatible with the control box
the display system.
The gear shift indicator
does not light up.
The optional gear shift sending
unit is not connected to the
control box.
Connect the sending unit to the
control box using the
instructions supplied with the
sending unit.
The gear shift indicator
does not operate
properly.
The gear shift decoder
is not connected properly,
or programmed correctly.
The internal turn signal
and high beam
indicators do not light up.
The control box is not connected
to the vehicle's electrical
system properly.
Check the connections to the
transmission linkage and to
the control box.
Check gear shift decoder
Installation manual.
Check the wires connected to the
HIGH, LEFT, and RIGHT
terminals on the control box.
The Check Engine
indicator does not
operate properly.
The control box is not connected
to an engine control module.
31
This feature is designed to work
with engine control systems that
provide an active low signal.
MAN 650314:D
Symptom
Possible Problem
Solution
----------------------------------------------------------------------------------------------------------------------------------The Check Engine
The Engine Control Module
Connect a bulb with one wire to
indicator stays on
(ECM) needs to see the
keyed power and the other to
all of the time.
load of a light connected to it.
the CHECK ENG terminal.
The Function switches
do not operate
properly.
The push-button switches are
not connected to the control
box.
The wrong type of switch is
being used.
Momentary push-button or toggle
switches must be connected to
the SW1 and SW2 terminals
as described in the manual.
The switch terminal connected
to the control box should
normally be open. When the
the switch is activated, the
terminal should make contact
to ground.
The display system starts
up in the demonstration
mode and remains in it.
SW2 terminal is constantly
connected to ground.
Disconnect or replace the
SW2 switch.
The clock doesn’t keep
time.
Constant power terminal is
losing power.
Ensure Constant Power terminal
has 12v even when key is off.
Display is too dark or light.
Contrast need to be adjusted.
See manual for contrast adjusting
instructions.
VHX Series Specifications
SUPPLY
Voltage Range(BAT)
8 to 22 V
Ignition
>8V
INPUTS
Active High
Low Max Min High
High, Left, Right,
3.7 V
8.4 V
Gear, Wait, DIM
Active Low
Low Max Min High
SW1,SW2, Check
2.7 V
6.0 V
Brake, Cruise, 4 X 4
3.7 V
8.4 V
Tachometer
Setting
Low Max High Min
Normal
3.0 V
7.6 V
Low-Volt
0.9 V
4.1 V
Speedometer
Square Wave
Sin Wave
> 1.2 VP-P
> 1.4 VP-P
OUTPUT
WARN, SPD
< 600 mA
Current Draw
IGN Off
≈ 0.3 mA
IGN On, LIGHT Off
≈ 101 mA
IGN On, LIGHT On
≈ 280 mA
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MAN 650314:D
SERVICE AND REPAIR
DAKOTA DIGITAL offers complete service and repair of its product line. In addition, technical consultation is
available to help you work through any questions or problems you may be having installing one of our products.
Please read through the Troubleshooting Guide. There, you will find the solution to most problems.
Should you ever need to send the unit back for repairs, please call our technical support line, (605) 332-6513,
to request a Return Merchandise Authorization number. Package the product in a good quality box along with
plenty of packing material. Ship the product by UPS or insured Parcel Post. Be sure to include the RMA number on
the package, and include a complete description of the problem with RMA number, your full name and address
(street address preferred), and a telephone number where you can be reached during the day. Any returns for
warranty work must include a copy of the dated sales receipt from your place of purchase. Send no money. We will
bill you after repair.
Dakota Digital Limited Lifetime Warranty
DAKOTA DIGITAL warrants to the ORIGINAL PURCHASER of this product that should it, under normal use
and condition, be proven defective in material or workmanship for the lifetime of the original vehicle it was installed in,
such defect(s) will be repaired or replaced at Dakota Digital’s option.
This warranty does not cover nor extend to damage to the vehicle’s systems, and does not cover removal or
reinstallation of the product. This Warranty does not apply to any product or part thereof which in the opinion of the
Company has been damaged through alteration, improper installation, mishandling, misuse, neglect, or accident.
This Warranty is in lieu of all other expressed warranties or liabilities. Any implied warranties, including any
implied warranty of merchantability, shall be limited to the duration of this written warranty. No person or
representative is authorized to assume, for Dakota Digital, any liability other than expressed herein in connection with
the sale of this product.
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