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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 117 (Exterior Lighting System) >> Diagnostic Tests >> Public Safety - Police Package >> Pinpoint Tests >> Pinpoint Test Z: The Public Safety Equipment Power Supply Is Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

The police power relay (switch side) is supplied battery voltage from the battery junction box (BJB) fuse 112 (40A) through circuit 175 (BK/YE). When the ignition switch is in the RUN position, the police power relay coil is supplied voltage from the central junction box (CJB) through circuit 964 (DB/LG). Ground for the police power relay is supplied through circuit 57 (BK). When the police power relay is energized, voltage is routed through circuit 401 (PK) to multiple police systems.

This pinpoint test is intended to diagnose the following:

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