Wash Operation

During front washer requests, the windshield wiper washer switch supplies a ground signal to the windshield washer switch signal circuit indicating to the BCM that washers are requested. Upon this signal, the BCM will ground the WIPER PCB relay coil and the FRT WASHER PCB relay. This will operate the wipers at a low speed and activate the washer pump for as long as the Wash switch is held.