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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 928 (Exterior Lighting System) >> Diagnostic Tests >> Turn Signal and Hazard Lamps >> Pinpoint Tests >> Pinpoint Test P: The Hazard Lamps Are Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 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 hazard switch through circuit 1689 (RD/WH). When the hazard switch is pressed, the voltage signal is routed to ground through circuit 570 (BK/WH). When the SJB detects a hazard lamps request, the SJB sends voltage to all the turn lamps.

Possible Causes

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