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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 928 (Exterior Lighting System) >> Diagnostic Tests >> Reversing Lamps >> Pinpoint Tests >> Pinpoint Test V: The Reversing Lamps Are Inoperative >> Normal Operation - Manual Transaxle

Normal Operation - Manual Transaxle

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 SJB provides a reference signal to the reversing lamp switch through circuit 1789 (VT/WH). When the transaxle is placed into reverse gear, the reversing lamp switch routes the voltage signal to ground through circuit 57 (BK). The SJB then provides ground to an internal relay which routes voltage to circuit 140 (BK/PK) to the reversing lamps.

Possible Causes

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