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Home >> Ford >> 2017 >> Transit Connect XL, Van Cargo >> Repair and Diagnosis >> Body & Frame >> Windows And Glass - Glass, Frames And Mechanisms >> Description And Operation >> Glass, Frames and Mechanisms - Vehicles With: One-Touch Open and Close Front Windows - System Operation and Component Description >> System Operation >> Rear Window Defrost

Rear Window Defrost

When the rear window defrost switch is activated, the BCM activates the rear window defrost relay (located in the BJB). When the rear window defrost is activated from the switch, the rear window defrost grid is energized and the BCM supplies voltage to illuminate the rear window defrost switch status LED. The rear window defrost system may also be automatically activated as an extra load for accelerated engine warm-up, however the defrost switch status LED remains off unless the defrost switch is activated.

The BCM deactivates the rear window defrost relay when one of these conditions is met: