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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1012 (Exterior Lighting System) >> Diagnostic Tests >> Headlamps >> Pinpoint Tests >> Pinpoint Test A: Both High Beams Are Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

When the headlamp switch is placed in the HEADLAMPS ON position, the smart junction box (SJB) monitors the high beam request circuit from the multifunction switch through circuit CLF02 (GY/BN). When the multifunction switch is placed in the HIGH BEAM position, the signal is routed to ground through circuit GD114 (BK/BU). The SJB then energizes the high beam relay (integral to the SJB) which supplies voltage to the headlamps through circuit CLF08 (YE/VT).

This pinpoint test is intended to diagnose the following:

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