Test Z: The Trailer Lamps Are On Continuously

PINPOINT TEST Z: THE TRAILER LAMPS ARE ON CONTINUOUSLY

Z1:

Z1-Z2:

Normal Operation
Voltage to the trailer tow lamps is controlled by the smart junction box (SJB). Circuits 52 (YE) and 64 (DG) supply voltage to the trailer tow LH and RH stop/turn lamps respectively. Circuit 962 (BN/WH) supplies voltage to the trailer tow parking lamps.

Possible Causes
- circuit 64 (DG) short to voltage
- circuit 52 (YE) short to voltage
- circuit 962 (BN/WH) short to voltage
- SJB