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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 818 (Exterior Lighting System (F250-F550)) >> Diagnostic Tests >> Trailer Lamps >> Pinpoint Tests >> Pinpoint Test Y: The Individual Trailer Lamp Is Inoperative - LH Trailer Turn Signal/Stoplamp/Hazard Lamp >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The trailer tow LH turn relay coil receives voltage through circuit 9 (LG/OG) when the vehicle LH rear lamp is illuminated. The trailer tow LH turn relay coil is grounded through circuit 57 (BK). The battery junction box (BJB) fuse 9 (20A) supplies voltage to the trailer tow LH turn relay through circuit 1362 (DG/OG). When the trailer tow LH turn relay is energized, the voltage is routed to the trailer tow connector through circuit 52 (YE).

Possible Causes

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