GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Backup Lamps

Body and Accessories/Lighting Systems/Special Functions/Light Test

The body control module (BCM) activates the backup lamps for 5 seconds when you select ON. This applies to vehicles equipped with automatic transmissions only.

Fog Lamps

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the front fog lamps for 5 seconds when you select ON.

Headlamps

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the low beam headlamps for 5 seconds when you select ON.

High Beams

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the high beam headlamps for 5 seconds when you select ON.

Inadvertent Power

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the inadvertent power relay for 5 seconds when you select ON.

Interior Lamps

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the interior lamp control for 5 seconds when you select ON. The courtesy lamps should illuminate for 5 seconds and then turn off through the theater dimming feature.

LF Turn Lamp/DRL

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the left front turn/drl lamp for 5 seconds when you select ON.

LR Turn Signal

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the left rear turn signal lamp for 5 seconds when you select ON.

Mode Switch LED

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the mode switch LED when you select ON.

Parking Lamps

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the park lamp relay for 5 seconds when you select ON.

Rear Fog Lamps

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the rear fog lamps for 5 seconds when you select ON.

RF Turn Lamp/DRL

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the right front turn/drl lamp for 5 seconds when you select ON.

RR Turn Signal

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the right rear stop/turn lamp for 5 seconds when you select ON.

Stop Lamp Relay Control

Body and Accessories/Lighting Systems/Special Functions/Light Test

The BCM activates the stop lamps for 5 seconds when you select ON.