GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Light Test

Daytime Running Lamps

The BCM activates the DRL relays when there is sufficient light to the ambient light sensor and you select ON. The daytime running lamps will remain illuminated until commanded OFF.

Light Test

Parking Lamps

The BCM activates the park lamp relay when you select ON. The park lamps illuminate until commanded OFF.

Light Test

Backup Lamps

The BCM activates the backup lamps when you select ON. The backup lamps remain illuminated until commanded OFF.

Inadvertant Power

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The BCM deactivates the inadvertant power relay when you select OFF. The inadvertant power relay remains deactivated until commanded ON.