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MAN 650067:F
33
Troubleshooting guide.
Problem Possible cause Solution
Clock will not light up Ignition key is not on. Make sure the key is on.
Red wire does not have Connect to a location that has power
power. only when the key is on.
White/Red wire does not have Connect to a location that has power
power. all of the time.
Black wire is not getting Connect ground to a different location.
a good ground.
Power is reversed. Connect black to negative ground, red and
white/red to +12V power.
Clock is damaged. Return clock for repair. (see instructions)
Clock will not turn off when The red wire has constant Connect the red to switched power, the
the key is off. power. white/red to constant power.
Clock lights up, but does Loose connection on white/red Reconnect white/red wire.
not read correctly. power wire.
Poor ground connection. Move ground to different location
Time is not set. Set time. (see instructions)
Clock is damaged. Return clock for repair. (see instructions)
Clock will not keep time. White/red wire does not have Connect to a location that has power when
constant power. the key is on or off.
Loose connection on white/red Reconnect white/red wire.
power wire.
Poor ground connection. Move ground to different location
Time adjustment needs to be See “Setting the time”. Step 8 changes
set. the fine tuning.
Clock will not dim. Blue wire is not connected Check wiring connections.
correctly.
Clock remains dim at all Blue wire is getting power Connect blue wire to location that only
times. all of the time. has power when the headlights are on.
Battery is very low. Recharge or replace vehicle battery.
Clock is damaged. Return clock for repair. (contact factory)
Gauge will not display the Temp sensor is not connected Check sensor connections to gauge.
temperature. correctly.
Temperature readout shows Gray wire is shorted to ground. Check connections to gray wire.
“---“. Sensor harness is pinched or Inspect sensor harness for damage.
shorted.
Sensor temperature is below Warm sensor up and watch for change.
-39F.
Sensor is damaged. Return sensor for repair. (see instructions)
Temperature reads in C Incorrect temp unit selected Change unit in setup. (see instructions)
instead of F.
Technical specifications
Minimum operating voltage - 5 volts
Maximum operating voltage - 17 volts
(operating at or near maximum voltage for an extended time can damage unit)
Maximum temperature reading - 250°F (125°C)
Temperature accuracy - ±2°F (±1°C)
Clock accuracy - ±2 minute per month (±0.5 with adjustment)
Standby current draw (key off) - 0.004 A
Typical current draw (@ 13.8V) - 0.10 A