GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Wipers OFF

Battery Voltage Signal

Data

Volts

Varies

Windshield Washer Switch

Data

Active/Inactive

Inactive

Windshield Wiper Switch

Data

On/Off

Off

Wiper Motor Delay Time

Data

Seconds

0

Wiper Motor Relay Command

Data

On/Off

Off

Wiper Motor Relay Status

Data

On/Off

Off

Wiper Park Switch

Data

Active/Inactive

Inactive

Wiper Switch

Data

Volts

0