Circuit Description
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) controls and monitors the state of the WPR2 relay control circuit. When the windshield wiper switch is placed in to a high speed setting, a signal is applied to the BCM through the windshield wiper switch high signal circuit. The BCM then applies battery positive voltage to the WPR2 relay through the WPR2 relay control circuit. This energizes the WPR2 relay, allowing battery positive voltage to be applies from the FRT WPR fuse, through the switched contacts of the WPR1 relay and through the switched contracts of the WPR2 relay to the windshield wiper motor. Ground is applied at all times to the coil side of the WPR2 relay and to the windshield wiper motor from G200.