Trailer Tow
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
The SJB controls the ground circuit for the trailer tow relay coils. The SJB provides a ground to the appropriate trailer tow relay(s) to correspond with the appropriate vehicle exterior lighting requests. These requests include the parking lamps, the turn/hazard lamps and the stoplamps. When a trailer tow relay is energized, voltage is routed to the trailer tow connector. A ground circuit is also provided to the trailer tow connector.