Normal Operation
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
Voltage to the trailer tow lamps is controlled by the smart junction box (SJB). Circuits 52 (YE) and 64 (DG) supply voltage to the trailer tow LH and RH stop/turn lamps respectively. Circuit 962 (BN/WH) supplies voltage to the trailer tow parking lamps.