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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 191 (Fixed & MOVEABLE Window Systems) >> Diagnostic Information & Procedures >> Liftgate Window Release Inoperative >> Circuit/System Description

Circuit/System Description

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The liftglass release switch is an input to the body control module (BCM). The BCM supplies battery voltage to the signal circuit and when the release switch is activated the signal circuit voltage goes low. The BCM controls the liftglass release actuator through the rear wiper motor control module. When the release switch signal is activated, the BCM applies battery voltage as a signal through the liftglass latch release control circuit to the rear wiper motor control module. The rear wiper motor control module supplies voltage to the release actuator through the liftglass latch assembly.