Circuit Description
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) controls and monitors the windshield washer fluid pump control circuit. The BCM supplies battery positive voltage to the windshield washer fluid pump when commanded ON by the windshield wiper/washer switch. Ground is applied at all times from G100 to the windshield washer fluid pump.