MAN #650776
14
Troubleshooting guide
Problem
Possible cause
Solution
Gauge will not light up
White/Red wire does not have power. Connect to a location that has constant, battery power.
Red wire does not have power.
Connect to a location that has power with the key on.
Black wire is not getting a good ground.
Connect ground to a different location.
Gauge is damaged.
Return gauge for repair. (see instructions)
Gauge lights up, but speed
Speed sensor not grounded properly.
Move ground to different location, preferable close to the
will only show zero.
speedometer ground.
Sensor is not sending a speed signal.
Check for a damaged or malfunctioning speed sensor.
PLEASE SET SPEED
Speedometer not calibrated
Gauge must be calibrated to your vehicle (see instructions)
Speed reading is erratic or
Speed sensor wire is loose or broken.
Check all wire connections and inspect wire for breaks.
jumps around.
Cable is loose or broken.
Check cable between sensor and transmission.
Poor ground connection.
Check ground connection on speedometer and sensor.
Ignition Interference
Check for tachometer wires routed with VSS signal wires.
Check for VSS signal wires routed near ignition coils
Check for poor ignition system ground
Use suppression spark plug wires
Speed reading is incorrect.
Gauge is not calibrated correctly.
Gauge must be calibrated (see instructions).
Gauge lights up, but tach
Yellow wire is not connected properly.
Check connection from yellow wire to tach signal wire.
will only show zero.
Ignition system not grounded properly.
Check engine and ignition system grounds.
Gauge is not grounded properly.
Check gauge and engine grounds.
Tach signal type is not set correctly.
Change the tach signal type (see instructions).
Gauge is not calibrated
Gauge must be recalibrated (see instructions).
Tach reading is erratic or
Tach signal wire is loose or broken.
Check all wire connections and inspect wire for breaks.
jumps around.
Poor ground connection.
Check ground connection on tachometer, engine, and ignition
system.
Tach reading is incorrect.
Gauge is not calibrated correctly.
Check cylinder count in tach setup menu (see instructions).
Gear indicator
displayed Gears not programmed.
Program gear indicator in setup. (see instructions).
High beam, turn signal, or
Loose or incorrect connection to indicator wire.
Check that the appropriate indicator wire has about 0 volts
Security indicator does not
when the indicator should be off and about 12 volts when
work.
the indicator should be on.
Neutral, Low Oil, or Engine
Loose or incorrect connection to indicator wire.
Check that the appropriate indicator wire has about 12 volts
indicator does not work.
when the indicator should be off and about 0 volts when the
indicator should be on.
Pressure reading does not
Pressure sender is not enabled in setup menu.
show up.
Oil Temperature reading
Oil Temp sender is not enabled in setup menu.
nu.
does not show up.
Pressure or temperature
Sender is shorted to ground.
Inspect wire for bare insulation or pinching.
reading shows
Pressure power wire is not connected.
Connect sensor RED wire to gauge WHITE/RED wire.
SHORT
Pressure or temperature
Sender wire is open or broken.
Inspect for breaks in wire connection.
reading shows
Sender is not grounded.
Check sender ground connection.
OPEN
Speed sensor voltage check:
All checks should be made with the sensor connected to the gauge and the key on. Checks should be done with a
volt meter and not a test light.
3-wire sensor:
Red wire should have 9-11 volts dc, slightly less than battery voltage.
Black wire should show ground, 0 volts dc at all times.
White wire should vary between 0 and 5 volts dc as the gear teeth pass by the sensor.
2-wire sensor:
Measure the voltage between the two sensor wires. With the wheel spinning the voltage should be about 1-10 volts ac (make
sure the meter is set to AC volts and not DC volts for this check).
