Symptom Chart

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

Condition	Possible Sources	Action
The trailer lamps are inoperative	Fuse Circuitry Central junction box (CJB) Trailer tow parking lamp relay Trailer	Go to Pinpoint Test V .
The individual trailer lamp is inoperative	Trailer	DETERMINE which individual trailer lamp is inoperative. If an individual trailer parking or reversing lamp is inoperative, SEND the trailer to an authorized camper/trailer repair facility. If a trailer turn lamp is inoperative, go to Pinpoint Test V .
The trailer lamps are on continuously	Circuitry CJB Trailer tow parking lamp relay Trailer	Go to Pinpoint Test W .
The trailer battery charging is inoperative	Fuse Circuitry Trailer tow battery charge relay CJB Trailer	Go to Pinpoint Test X .
The trailer electric brakes are inoperative/do not operate correctly	Fuse Circuitry Trailer brake control module Trailer	Go to Pinpoint Test Y .