Test X
PINPOINT TEST X: THE TRAILER LAMPS ARE ON CONTINUOUSLYTest X1-X2:
Test X3-X6:
Normal Operation
The trailer tow relays are supplied power from the BEC. Ground for the trailer tow parking lamp relay is provided through circuit 576 (DG). Ground for the trailer tow LH turn lamp relay is provided through circuit 374 (DB/WH). Ground for the trailer tow RH turn lamp relay is provided through circuit 378 (BN/YE). Ground control for the trailer tow relay coils is controlled by the SJB. When the trailer tow parking lamp relay is energized, voltage is routed from the BEC to the trailer tow connector through circuit 962 (BN/WH). When the trailer tow LH turn lamp relay is energized, voltage is routed from the BEC to the trailer tow connector through circuit 52 (YE). When the trailer tow RH turn lamp relay is energized, voltage is routed from the BEC to the trailer tow connector through circuit 64 (DG).
Possible Causes
- circuit 52 (YE) short to power
- circuit 64 (DG) short to power
- circuit 374 (DB/WH) short to ground
- circuit 378 (BN/YE) short to ground
- circuit 576 (DG) short to ground
- circuit 962 (BN/WH) short to power
- trailer tow relay
- BEC
- SJB