F 350 4WD Super Duty V10-6.8L VIN Y (2006)
AB1-AB3
Normal Operation - Trailer Tow RH Turn
The trailer tow RH turn relay coil receives voltage through circuit 5 (OG/LB) when the vehicle RH rear lamp is illuminated. The trailer tow RH turn
relay coil is grounded through circuit 57 (BK). The battery junction box (BJB) fuse 9 (20A) supplies voltage to the trailer tow RH turn relay through
circuit 1362 (DG/OG). When the trailer tow RH turn relay is energized, the voltage is routed to the trailer tow connector through circuit 64 (DG).
Normal Operation - Trailer Tow LH Turn
The trailer tow LH turn relay coil receives voltage through circuit 9 (LG/OG) when the vehicle LH rear lamp is illuminated. The trailer tow LH turn
relay coil is grounded through circuit 57 (BK). The BJB fuse 9 (20A) supplies voltage to the trailer tow LH turn relay through circuit 1362 (DG/OG).
When the trailer tow LH turn relay is energized, the voltage is routed to the trailer tow connector through circuit 52 (YE).
Normal Operation - Trailer Tow Parking
The trailer tow parking lamp relay is integral to the central junction box (CJB). The trailer tow parking lamp relay coil receives voltage through circuit
14 (BN) when the vehicle parking lamps are illuminated. The trailer tow parking lamp relay coil is grounded through circuit 570 (BK/WH). The CJB
fuse 38 (20A) supplies voltage to the trailer tow parking lamp relay. When the trailer tow parking lamp relay is energized, the voltage is routed to the
trailer tow connector through circuit 962 (BN/WH).
