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 relay when there is sufficient light to the ambient light sensor and you select ON. The daytime running lights will remain illuminated for approximately 5 seconds.

Light Test

High Beams

The BCM activates the high beam relay when you select ON. The high beams will remain illuminated for approximately 5 seconds.

Light Test

Low Beams

The BCM activates the low beam relay when you select ON. The low beams will remain illuminated for approximately 5 seconds.

Light Test

Parking Lamps

The BCM activates the park lamp relay when you select ON. The park lamps will remain illuminated for approximately 5 seconds.

Light Test

Courtesy Lamps

The BCM activates the courtesy lamp relay when you select ON. The courtesy lamps will remain illuminated for approximately 5 seconds.

Light Test

Backup Lamps

The BCM illuminates the backup lamps when you select ON. The backup lamps will remain ON.

Miscellaneous Test

Headlamps On Indicator

The BCM Illuminates the headlamps on indicator when you select ON. The headlamps on indicator will remain illuminated for approximately 5 seconds.

Inadvertent Power

 

The BCM deactivates the inadvertent power circuit when you select OFF. The inadvertent power circuit will remain inactive for approximately 5 seconds.