MAN #650777
13
Troubleshooting guide
Problem
Possible cause
Solution
Gauge will not light up.
Brown/Gray wire does not have power.
Inspect and repair stock harness.
Orange/White wire does not have power.
Inspect and repair stock harness.
Orange wire does not have power.
Inspect and repair stock harness.
Black wire is not getting a good ground.
Inspect and repair stock harness.
Ignition switch not connected or damaged.
Inspect and repair stock switch or harness.
Gauge is damaged.
Return gauge for repair (see instructions).
Gauge lights up, but speed
No data from ECM.
Check engine trouble codes.
will only show zero.
Sensor is not sending a speed signal.
Check wiring and test sensor.
Speed reading is incorrect.
Gauge is not calibrated correctly.
Gauge must be calibrated (see instructions).
Gauge lights up, but tach
No data from ECM.
Check engine trouble codes.
will only show zero.
Engine indicator does
No data from ECM.
Check engine trouble codes.
not work.
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.
does not show up.
Pressure or temperature
Sender is shorted to ground.
Inspect wire for bare insulation or pinching.
Pressure power wire is not connected.
Connect sensor RED wire to gauge WHITE/RED wire.
Pressure or temperature
Sender wire is open or broken.
Inspect for breaks in wire connection.
reading show
Sender is not grounded.
Check sender ground connection.
Gauge display has white
This is a default setting on this gauge to increase visibility in direct
background in sunlight sunlight. This can be modif
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).
