GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Light Test

Cluster Dimming

The BCM actuates the instrument panel lamp output when you select ON. The instrument panel lamps should illuminate until commanded OFF with the scan tool. The park lamps must be on for this function to work.

Light Test

Daytime Running Lamps

The BCM actuates the DRL relay for 5 seconds when you select ON. The Daytime Running Lamps should illuminate until commanded OFF with the scan tool.

Inadvertent Power

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The BCM deactivates the INADVERTENT POWER output when you select OFF. The foot well, IP compartment, rear compartment, vanity mirror, and courtesy lamps should be inoperative until commanded ON with the scan tool.

Light Test

Interior Lamps

The BCM actuates the interior lamp control for 5 seconds when you select ON. The foot well, and courtesy lamps should illuminate until commanded OFF with the scan tool.