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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 Y: The Individual Trailer Lamp Is Inoperative - Trailer Stop/Turn Lamp >> 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 battery junction box (BJB) fuse 14 (15A) supplies voltage to the LH and RH trailer tow stop/turn relays. The trailer tow stop/turn relay coils are grounded through circuit GD120 (BK/GN).

The trailer tow LH stop/turn relay coil receives voltage from circuit CLS18 (GY/BN) 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 through circuit CAT06 (YE).

The trailer tow RH stop/turn relay coil receives voltage through circuit CLS19 (VT/OG) 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 through circuit CAT09 (GN).

This pinpoint test is intended to diagnose the following:

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