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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 721 (Exterior Lighting System) >> Diagnostic Tests >> Parking, Rear and License Plate Lamps >> Pinpoint Tests >> Pinpoint Test O: The Parking Lamps Are Inoperative With The Autolamps On >> 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 vehicle security module (VSM) is supplied battery voltage through circuit 195 (TN/WH). When exterior lamps are turned on by the VSM, voltage is routed from circuit 195 (TN/WH) to circuit 14 (BN) through an internal relay.

Possible Causes

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