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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1411 (Window And Glass) >> Diagnosis And Testing >> Glass, Frames and Mechanisms >> Pinpoint Tests >> Pinpoint Test G: The Defrost System Does Not Shut Off Automatically >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

The key must be in the START or RUN position for the heated rear window to operate. When the rear window defrost switch is pressed, a momentary ground is supplied to the driver door module (DDM) through circuit 1010 (DB/OG). The DDM provides a ground for the rear window defrost relay coil on circuit 688 (GY/LB). When the rear window defrost relay coil is energized, the relay switch closes, providing voltage to the heated rear window grid, the heated rear window indicator, and the heated exterior mirror (if equipped) through circuit 186 (BN/LB). The heated rear window grid and the rear window defrost switch are grounded through circuit 57 (BK).

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