GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Park Lamp, Parking Lamps Relay Output

Special Functions, Output Control, Misc. Test, Light Test

The body control module (BCM) actuates the park relay when you select ON. The park lamps should come on for 5 seconds.

Horn Output

Special Functions, Output Control, Misc. Test, Horn

The body control module (BCM) actuates the horn relay when you select ON. The horn should sound for 5 seconds.

Low Beams

Special Functions, Output Control, Misc. Test, Light Test

The body control module (BCM) actuates the headlamp relay when you select ON. The low beams should come on for 5 seconds.