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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 721 (Exterior Lighting System) >> Diagnostic Tests >> Trailer Lamps >> Pinpoint Tests >> Pinpoint Test X: The Trailer Battery Charging Is Inoperative >> Normal Operation

Normal Operation

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.

The trailer battery charging is accomplished through the use of the trailer tow battery charge relay. The trailer tow battery charge relay is supplied voltage and ground through the central junction box (CJB). When energized, the trailer tow battery charge relay routes voltage from the CJB fuse 103 (30A) to the trailer tow connector through circuit 49 (OG).

Possible Causes

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