JEGS 41260-62 5-inch Tachometer Installation Instructions

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Jegs 41260-62 5-inch Tachometer Installation Instructions | Manualzz
Installation Instructions for 41260, 41261 & 41262
5” Tachometer
Before You Start:
• Read instructions completely before installing.
• ALWAYS WEAR SAFETY GLASSES.
• Disconnect negative (-) battery cable before
installing gauge.
•
•
General Information:
12-volt DC negative (-) ground electrical systems.
Wiring:
Use 20 AWG stranded or heavier wire for installation.
Route wires away from any moving parts and hot engine
components. Secure wires firmly along their route. Note:
As a safety precaution, the 12V+ connections (RED and
BLUE wires) should be fused. We recommend using a 1
Amp, 3 AG fast acting type cartridge fuse.
Install gauge only when engine is cool and
ignition is off.
Make sure all necessary tools, materials, and
parts are on hand.
Tachometer Signal Hookup:
This performance tachometer has two signal input
options (GREEN and PURPLE wires). See Signal
Hookup below. Choose the option best suited for your
vehicle's ignition system. Only connect 1 signal input.
If you are unsure which signal input to use, connect your
signal source to the PURPLE input.
NEVER CONNECT SIGNAL WIRE TO THE COIL
WHEN USING AN MSD OR SIMILAR HIGH OUTPUT
CAPACITIVE DISCHARGE STYLE IGNITION SYSTEM.
Incorrect installation will damage the tachometer.
Fig 1. Wiring Diagram:
Table 1. Wiring Summary:
Wire Color
PURPLE
GREEN
BLACK
WHITE
ORANGE
RED
BLUE
Shift Light Connector
Comments
Use PURPLE signal input if signal is a “clean” signal (tach output terminal, ECU, tach adapter etc.). See
Fig 1.
Use GREEN signal input if you are using a signal from an ignition coil (-). See Fig 1.
Connect to a good common ground.
Connect to 12V+ dash lighting for white backlight.
Connect to 12V+ dash lighting for amber backlight.
Connect to 12V+ ignition circuit so power is ON when ignition is turned on.
Connect to a 12V+ source that is always on, even when ignition is OFF (i.e. Battery +).
Connect it to the red/black 2-pin connector.
1-800-345-4545 jegs.com
View and Clear Peak RPM Value
• To view the peak RPM value, press the UP
button. The pointer will indicate the previous
peak RPM.
• To exit, press the UP button again.
• To clear the peak RPM, press and hold the
DOWN button for 3 seconds while viewing the
peak RPM value. The pointer will move to zero
to confirm that the peak RPM value has been
cleared.
PPR (Pulse per Revolution)
PPR (pulses per revolution) relates to how many times
the ignition fires per crankshaft revolution. Because
tachometer outputs on modern vehicles can range from
1 PPR to 4 PPR for a V8 engine the new standard is to
refer to PPR. For standard ignitions PPR is typically half
the number of cylinders.
Shift Light RPM Set Point
• Press the MENU button to access SHIFT mode.
The pointer will indicate the current shift light
activation set point.
• To change the shift light activation set point,
press the UP or DOWN buttons. Hold the UP or
DOWN button for rapid increase or decrease of
the set point.
• Press MENU to save your changes and exit
SHIFT mode.
PPR Setting
0.5 PPR (1 Cyl)
1 PPR (2 Cyl)
2 PPR (4 Cyl)
3 PPR (6 Cyl)
4 PPR (8 Cyl)
5 PPR (10 Cyl)
6 PPR (12 Cyl)
Pointer Position, RPM
500
1000
2000
3000
4000
5000
6000
Use the UP/DOWN buttons to change the PPR setting.
Press MENU to save your changes and exit calibration
mode.
Through-Dial Lighting Color
For white backlight, connect the WHITE wire to your
12V+ dash lighting. For amber backlight, connect the
ORANGE wire to your 12V+ dash lighting.
Tachometer Signal Hookup (Additional Info)
This performance tachometer has two signal input
options. Choose the option best suited for your vehicle's
ignition system. Only connect 1 signal input. If you are
unsure which signal input to use, connect your signal
source to the PURPLE input.
Dimmable LED Lighting
This gauge features through-dial, high-definition LED
lighting that will not dim when used with standard dash
dimmers.
Lens Cleaning
The gauge lens is made of acrylic plastic. Do not use any
chemicals or abrasives on the lens. To prevent
scratching, caution must be used when cleaning. To
clean, wipe lightly with a damp soft cloth.
Lens Protective Film
The gauge comes with a soft protective plastic film on
the lens. Remove the protective film when gauge
installation is complete.
Calibration
To calibrate, hold down the MENU button while turning
the ignition on. The pointer will indicate the current PPR
setting (0.5-6) as shown in the table below.
Purple Wire Input: “Clean” Signal
On applications where a "clean" tachometer signal
output is available (typically a 12V square wave signal)
connect the signal wire from the signal source to the
PURPLE wire on the back of the tachometer.
Applications with “clean” tachometer output signals
include ignition boxes with tachometer output terminal,
dedicated tachometer signal from ECU, and tachometer
adapters.
Green Wire Input: Ignition Coil (-)
On standard ignition coils connect the signal wire from
the coil negative (-) to the GREEN wire on the back of
the tachometer. Note: Some ignition coil applications
(including many 4 cylinder applications) output a
relatively clean signal. If this is the case for your
application you may need to use the PURPLE signal
input wire.
1-800-345-4545 jegs.com

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Key Features

  • 5-inch display
  • Peak RPM memory
  • Shift light feature
  • Two signal input options
  • Dimmable LED backlight
  • White or amber backlight
  • Calibration mode

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Frequently Answers and Questions

How do I change the PPR setting?
Hold down the MENU button while turning the ignition on. The pointer will indicate the current PPR setting (0.5-6). Use the UP/DOWN buttons to change the PPR setting. Press MENU to save your changes and exit calibration mode.
How do I set the shift light RPM point?
Press the MENU button to access SHIFT mode. The pointer will indicate the current shift light activation set point. To change the shift light activation set point, press the UP or DOWN buttons. Hold the UP or DOWN button for rapid increase or decrease of the set point. Press MENU to save your changes and exit SHIFT mode.
What is the difference between the PURPLE and GREEN signal inputs?
The PURPLE input is for a 'clean' signal from sources like ignition boxes with a tachometer output terminal, ECU, or tachometer adapters. The GREEN input is for a signal from an ignition coil (-) and should not be used with high-output ignition systems.
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