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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 >> Headlamps >> Pinpoint Tests >> Pinpoint Test B: One Low Beam Headlamp 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 lighting control module (LCM) is supplied voltage from the central junction box (CJB) through circuits 1055 (WH/LG) and 1056 (DB/LG) for the LH and RH low beams, respectively. When a request for the low beams is received by the LCM, the LCM provides voltage through circuits 160 (DB/WH) and 161 (DG/OG) to the LH and RH headlamps, respectively. Ground for the low beams is provided through circuit 57 (BK).

This pinpoint test is intended to diagnose the following:

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