Test N: The Trailer Lamps Are Inoperative

PINPOINT TEST N: THE TRAILER LAMPS ARE INOPERATIVE

N1-N3:

N3-N4:

N4-N6:

N7-N9:

N9-N10:

N11:

N12-N13:

N13-N14:

N15-N16:

N17-N18:

N18 Continued:

Normal Operation - All Trailer Tow Lamps
All of the trailer tow lamps are provided ground through circuit 206 (WH). All of the trailer tow relays share the same ground through circuit 57 (BK).

Normal Operation - Trailer Tow Turn/Stoplamps
The trailer tow turn lamp relay coils are provided voltage through circuit 9 (LG/OG) (LH rear turn/stop) and circuit 5 (OG/LB) (RH rear turn/stop) when the brake pedal is applied. Ground for the trailer tow turn lamp relay coils is provided through circuit 57 (BK). Voltage for the trailer tow turn lamp relays switch side is provided by the battery junction box (BJB) fuse 26 (20A) through circuit 212 (DB). When the trailer tow turn lamp relay is energized, voltage is routed to the trailer tow connector through circuit 52 (YE) (LH turn/stop) and/or 64 (DG) (RH turn/stop).

Normal Operation - Trailer Tow Parking Lamps
The trailer tow parking lamp relay coil is provided voltage through circuit 14 (BN) when the vehicle parking lamps are illuminated. Ground for the trailer tow parking lamp relay coil is provided through circuit 57 (BK). Voltage for the trailer tow parking lamp relay switch side is provided by the BJB fuse 24 (20A) through circuit 1043 (DG/YE). When the trailer tow parking lamp relay is energized, voltage is routed to the trailer tow connector through circuit 962 (BN/WH).

Normal Operation - Trailer Tow Reversing Lamps
The trailer tow reversing lamp relay coil is provided voltage through circuit 140 (BK/PK) when the vehicle reversing lamps are illuminated. Ground for the trailer tow reversing lamp relay coil is provided through circuit 57 (BK). Voltage for the trailer tow reversing lamp relay switch side is provided by the BJB fuse 24 (20A) through circuit 1043 (DG/YE). When the trailer tow reversing lamp relay is energized, voltage is routed to the trailer tow connector through circuit 963 (BK/LG).

Possible Causes
- Fuse
- Circuit 5 (OG/LB) open
- Circuit 9 (LG/OG) open
- Circuit 14 (BN) open
- Circuit 52 (YE) open
- Circuit 57 (BK) open
- Circuit 64 (DG) open
- Circuit 140 (BK/PK) open
- Circuit 206 (WH) open
- Circuit 212 (DB) open
- Circuit 962 (BN/WH) open
- Circuit 963 (BK/LG) open
- Circuit 1043 (DG/YE) open
- Trailer tow relay
- Trailer