THE TRAILER LAMPS ARE INOPERATIVE — TRAILER PARKING LAMPS


Key in OFF position.
Disconnect: Trailer Tow C4098 (4-pin).
Disconnect: Trailer Tow C4099 (7-pin) .
Disconnect the trailer from the vehicle.
Check the operation of the vehicle exterior lighting systems for any concerns.
Does the exterior lighting system of the vehicle operate correctly?



Place the headlamp switch in the OFF position.
Disconnect: Central Junction Box (CJB) C270j.
Place the headlamp switch in the ON position.


<LI>Measure the voltage between the CJB C270j pin 15, circuit 962 (BN/WH), (component side) and ground.