GM Service Manual Online
For 1990-2009 cars only

Scan Tool Parameter

Units Displayed

Typical Data Value

Operating Conditions: Ignition in RUN position, Engine OFF, All doors closed, DRLs OFF

Battery 1

Volts

Varies

Washer Switch

On/Off

Off

Wiper Ground

On/Off

Off

Wiper Park Switch

On/Off

On

Wiper Relay Cmd

On/Off

Off

Wiper Switch

Volts

Varies

Wiper Switch State

Undefined, Off, Delay 1, Delay 2, Delay 3, Mist/HI/LO

Varies