Tests AD: The Trailer Lamps Are On Continuously

PINPOINT TEST AD: THE TRAILER LAMPS ARE ON CONTINUOUSLY

AD1-AD5:

AD5-AD7:

AD7 Continued:

Normal Operation
Circuit 14 (BN) 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). Circuit 140 (BK/PK) supplies power to the reversing lamps and the coil side of the trailer tow reversing lamp relay. When the trailer tow reversing lamp relay is energized, voltage received from circuit 1043 (DG/YE) is switched to the trailer tow connector through circuit 963 (BK/LG).

Possible Causes
- Circuit 52 (YE) short to power
- Circuit 64 (DG) short to power
- Circuit 962 (BN/WH) short to power
- Circuit 963 (BK/LG) short to power
- Trailer tow reversing lamp relay
- Trailer tow parking lamp relay
- Trailer tow RH turn or LH turn relay
- Trailer