Normal Operation
WARNING: This page is about a different car, the 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
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 battery junction box (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).