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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 386 (Exterior Lighting System) >> Diagnosis And Testing >> Turn Signal and Hazard Lamps >> Pinpoint Tests >> Pinpoint Test Q: The Hazard Lamps Are Always On >> 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 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.

The timed on/off cycle is determined in the SJB and is set to flash approximately 80 times per minute if all hazard lamps operate correctly.

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