Tests AB

PINPOINT TEST AB: THE TRAILER LAMPS ON INOPERATIVE - PARKING LAMPS

Test AB1-AB3:

Test AB4-AB5:

Normal Operation
Circuit 14 (BN), under normal operation, supplies power to the exterior lamps and the coil side of the trailer tow parking lamp relay. When the trailer tow parking lamp relay is energized, voltage received from circuit 1043 (DG/YE) is switched to the trailer tow connector through circuit 962 (BN/WH). Ground is supplied to the trailer tow parking lamp relay through circuit 1205 (BK).

Possible Causes
- circuit 14 (BN) open
- circuit 962 (BN/WH) open
- circuit 1043 (DG/YE) open
- circuit 1205 (BK) open
- trailer tow parking lamp relay
- trailer