HEADLINER GP-CAB 5387207 - Caterpillar

Illustration 1 g01297984
Typical example of the switch circuits
Illustration 2 g01297986
P1 terminals for programming the inputsTest Step 1. Determine the Vehicle's ConfigurationDetermine the configuration of the wiring for the switch.Expected Result:The switch is wired directly to the ECM.Results:
Hard wired - Proceed to Test Step 2.
J1939 Data Link - Repair: If there are other problems with the J1939 data link, refer to Troubleshooting, "Link - Test".If there are no other problems with the J1939 data link, the problem is with one of the following components:
Wiring between the switch and the vehicle control module
Switch
Fuse or circuit breakerBe sure to carefully check for problems with electrical connectors and wiring.Repair the problem, when possible.