5130, 5130B and 5230 Excavators, 784B, 785B, 785C, 789B, 789C, 793B and 793C Off-Highway Truck/Tractors and 992G, 994 and 994D Wheel Loaders Vital Information Management System (VIMS) Caterpillar

Illustration 1	g00730054
Schematic of the Payload Lamps

This diagnostic code is recorded when the VIMS module reads the voltage of the payload lamp and the voltage is above normal. The green payload lamps are ON CONTINUOUSLY as a result of this fault condition.

1. CHECK THE LAMP CIRCUIT.

   1. Turn the key start switch and the disconnect switch to the OFF position.

   2. Disconnect the machine harness from the VIMS module.

   3. Turn the disconnect switch to the ON position.

   4. Observe the green payload lamp.

   5. Turn the key start switch to the ON position.

      Expected Result: The green payload lamps turns ON.

      Results:

      • OK - Green payload lamps turn ON. The harness circuit (wire 636-GN(Green)) is shorted to the +battery. Repair the harness or replace the harness. STOP.

      • NOT OK - Green payload lamps are OFF. The main module has failed. Replace the VIMS main module. Refer to the Testing and Adjusting, "Module - Replace" section. STOP.