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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 559 (Exterior Lighting System) >> Diagnosis And Testing >> Headlamps >> Pinpoint Tests (Headlamps) >> Pinpoint Test B: The High Beams Are Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

The smart junction box (SJB) sends a voltage reference signal to the multifunction switch through circuit 1708 (LG/BK). When the multifunction switch is placed in the HIGH BEAM position, the signal is routed to ground through circuit 1205 (BK). When the SJB receives a request for the high beams, the SJB energizes an internal relay and voltage is routed to the high beams through circuit 1337 (VT/YE).

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