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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1406 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B2578: BCM >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The Body Control Module (BCM) controls the automatic autolamp relay through the autolamp relay control circuit. The BCM grounds the autolamp relay control circuit, energizing the automatic autolamp relay.

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