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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 721 (Exterior Lighting System) >> Diagnostic Tests >> Headlamps >> Pinpoint Tests >> Pinpoint Test C: The High Beams Are Inoperative >> 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 multifunction switch receives voltage from the headlamp switch through circuit 15 (RD/YE). When the multifunction switch is placed in the HIGH BEAM position, voltage is routed to the high beam relay coil through circuit 275 (YE). When the high beam relay coil receives battery voltage from circuit 275 (YE), the high beam relay is energized. Battery voltage received from within the central junction box (CJB) is then routed to circuit 12 (LG/BK) via CJB fuse 35 (20A) and then to the high beam headlamps through circuit 12 (LG/BK). Circuit 57 (BK) is the ground circuit for the headlamps and relay.

Possible Causes

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