GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Daytime Running Lamps

Light Test

The body control module (BCM) activates the DRL relay for 5 seconds when you select ON. The daytime running lights illuminate for 5 seconds.

Headlamps

Light Test

The BCM activates the headlamp relay when you select ON. The headlamps illuminate until commanded OFF.

Park Lamp

Light Test

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

Front Fog Lamps

Light Test

The BCM activates the FOG LP relay when you select ON. The fog lamps illuminate until commanded OFF.

Courtesy Lamps

Light Test

The BCM activates the theater dimming outputs for 5 seconds when you select ON. The dome, footwell, and courtesy lamps illuminate for 5 seconds.

Inadvertent Power

Inadvertent Power

The BCM activates the inadvertent power relay for 5 seconds.