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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1214 (Exterior Lighting System) >> Diagnosis And Testing >> Trailer Lamps >> Pinpoint Tests >> Pinpoint Test Z: The Trailer Stop/Turn Lamp Is Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The Battery Junction Box (BJB) fuse 14 (15A) supplies voltage to the LH and RH trailer tow stop/turn relays.

The trailer tow LH stop/turn relay coil receives voltage when the vehicle LH rear stoplamp is illuminated. When the trailer tow LH stop/turn relay is energized, voltage is routed to the trailer tow connector.

The trailer tow RH stop/turn relay coil receives voltage when the vehicle RH rear stoplamp is illuminated. When the trailer tow RH stop/turn relay is energized, voltage is routed to the trailer tow connector.

This pinpoint test is intended to diagnose the following: 

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