GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Backup Lamps

Light Test

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

LF Turn/DRL Lamp

Light Test

The BCM activates the left front turn signal lamps when you select ON. The turn signal lamps illuminate until commanded OFF.

Parking Lamp

Light Test

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

RF Turn/DRL Lamp

Light Test

The BCM activates the right front turn signal lamps when you select ON. The turn signal lamps illuminate until commanded OFF.

Interior Lamps

Light Test

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

Fog Lamps

Light Test

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

High Beam Relay

Light Test

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

Low Beam Relay

Light Test

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

LR Stop/Turn Signal Lamp

Light Test

The BCM activates the left rear stop/turn signal lamp when you select ON. The lamp illuminates until commanded OFF.

RR Stop/Turn Signal Lamp

Light Test

The BCM activates the right rear stop/turn signal lamp when you select ON. The lamp illuminates until commanded OFF.

Instrumentation Backlight Dimming

Light Test

The BCM commands the IPC to dim the instruments from full dim to full bright.