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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1012 (Exterior Lighting System) >> Diagnostic Tests >> Trailer Lamps >> Pinpoint Tests >> Pinpoint Test Z: The Trailer Lamps Are Inoperative - Trailer Parking Lamps >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The trailer tow parking lamp relay coil receives voltage through circuit CLS30 (VT/WH) when the vehicle parking lamps are illuminated. The trailer tow parking lamp relay coil is grounded through circuit GD120 (BK/GN). The battery junction box (BJB) fuse 8 (20A) supplies voltage to the trailer tow parking lamp relay switch side. When the trailer tow parking lamp relay is energized, the voltage is routed to the trailer tow connector through circuit CAT11 (BN).

This pinpoint test is intended to diagnose the following:

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