Washer System
WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
When the washer switch on the end of the wiper/washer stalk is pressed, the SCCM sends the request to the windshield wiper motor through the LIN . The windshield wiper motor activates the wash relay (which is internal to the windshield wiper motor) providing voltage to the washer pump and directing washer fluid to the windshield.