HOUSING GR 2377680 - Caterpillar

Illustration 1 g00890733
Power Circuit
Use this troubleshooting procedure for any of the problems that are listed below:
The POD is blank with no backlighting.
The POD is blank and the backlighting is functioning.Test Step 1. VERIFY THE PROBLEM
Observe the operation of the POD. Expected Result:The POD is operating normally.Results:
NORMAL OPERATION - The system is operating normally. Exit this procedure.STOP
BLANK W/O BACKLIGHT - The POD is blank with no backlighting. Proceed to Test Step 2.
BLANK WITH BACKLIGHT - The POD is blank and the backlighting is functioning. Proceed to Test Step 5.Test Step 2. CHECK THE +BATTERY CIRCUIT
Turn the disconnect switch and the key start switch to the "On" position.
At the back of the connector of the POD, insert a 7X-1710 Multimeter Probe along contact 1 (wire 138-GN(Green)) and contact 2 (251-BK(Black)).
Measure the voltage between contact 1 (wire 138-GN(Green)) and contact 3 (251-BK(Black)). Expected Result:The voltage is approximately 24 volts.Results:
OK - The voltage is approximately 24 volts. Proceed to Test Step 3.
NOT OK - The voltage is not approximately 24 volts. Repair: The +battery circuit has failed. Replace the fuse or repair the wiring of the +battery circuit.STOPTest Step 3. CHECK THE +BATTERY CIRCUIT OF THE WIRING HARNESS OF THE POD
The disconnect switch and the key start switch remain in the "On" position.
Measure the voltage between contact 2 (wire GN(Green)) of the On/Off switch on the