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Home >> Chevrolet >> 2001 >> Impala Base, 3.8 K >> Repair and Diagnosis >> External Pages >> Different car >> Section 504 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B2559: BCM Detects A Open When A Ground Is Expected >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue. However, it is still accessible from the selected car via links, so may be relevant.

The body control module (BCM) receives an active ground from the courtesy lamp ground circuit. This input provides a ground path for all courtesy lamps through the interior lamp control circuit.

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