Park Position Operation
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
When the wipers are commanded on, B+ is supplied to the windshield wiper motor park switch signal. With B+ applied, the wipers will park when in the at rest state.