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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1103 (Exterior Lighting System) >> Diagnostic Tests >> Daytime Running Lamps (DRL) >> Pinpoint Tests >> Pinpoint Test Y: The Daytime Running Lamps (DRL) Are Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

The DRL module receives voltage at all times through circuit 932 (GY/WH) and ground through circuit 1205 (BK). When the ignition switch is in the RUN position, the DRL module receives a voltage input from circuit 294 (WH/LB) to indicate the ignition switch position. When the DRL module senses the ignition switch in the RUN position, the DRL module provides a pulse width modulated (PWM) voltage to the headlamps through circuit 13 (RD/BK).

This pinpoint test is intended to diagnose the following:

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