E 250 V8-4.6L VIN W (2006)
N17-N18
Normal Operation - All Trailer Tow Lamps
The trailer tow lamps are provided ground through circuit 206 (WH).
Normal Operation - Trailer Tow Turn/Stoplamps
The trailer tow turn lamp relay coils are provided voltage through circuit 9 (LG/OG) (LH turn/stop) and circuit 5 (OG/LB) when the vehicle turn
signals are used. Ground for the trailer tow turn lamp relay coils is provided through circuit 57 (BK). Supply voltage for the trailer tow turn lamp
relays 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). Supply voltage for the trailer tow parking lamp relay 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). Supply voltage for the trailer tow reversing lamp relay 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
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Fuse
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Circuit 5 (OG/LB) open
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Circuit 9 (LG/OG) open