Test V: The Trailer Lamps Are Inoperative
PINPOINT TEST V: THE TRAILER LAMPS ARE INOPERATIVETest V1:
Test V1-V4:
Test V4-V6:
Test V6-V9:
Test V9-V11:
Test V12-V14:
Test V14 Continued:
Normal Operation
Circuit 14 (BN) supplies power to the exterior lamps and the coil side of the trailer tow parking lamp relay. Ground is supplied to the trailer tow parking lamp relay through the central junction box (CJB). When the trailer tow parking lamp relay is energized, voltage is routed from the CJB to the trailer tow connector through circuit 962 (BN/WH). Circuit 140 (BK/PK) supplies power to the trailer tow connector for the trailer to reversing lamps. Circuits 52 (YE) (LH stop/turn) and 64 (DG) (RH stop/turn) are spliced to circuits 9 (LG/OG) and 5 (OG/LB) respectively within the CJB. Ground is supplied to the trailer through circuit 206 (WH).
Possible Causes
- Circuit 14 (BN) open
- Circuit 52 (YE) open
- Circuit 64 (DG) open
- Circuit 140 (BK/PK) open
- Circuit 206 (WH) open
- Circuit 962 (BN/WH) open
- Trailer tow parking lamp relay
- CJB
- Trailer