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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 386 (Exterior Lighting System) >> Diagnosis And Testing >> Parking, Rear and License Plate Lamps >> Pinpoint Tests >> Pinpoint Test T: The Parking, Rear Or License Plate Lamps Are On Continuously >> Normal Operation

Normal Operation

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

The smart junction box (SJB) sends a reference signal to the multifunction switch through circuit 1032 (WH/BK). When the multifunction switch is switched to the parking lamps ON position, the voltage signal is routed to ground through circuit 570 (BK/WH).

When the SJB detects the multifunction switch in the parking lamps ON position, the SJB provides a ground for the parking lamp relay coil. Voltage to the parking lamp relay is provided internally by the SJB. When the parking lamp relay is energized, voltage is sent through circuit 14 (BN) to the parking and license plate lamps.

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