Circuit/System Description
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The windshield washer function is controlled by the body control module (BCM). When the washer switch is pressed, ground is applied through the switch contacts and the signal circuit to the BCM indicating the wash request. The BCM then applies ground through the control circuit to the coil side of the FRNT WASHER PUMP (PCB) relay energizing the relay. With the relay energized, B+ from the WASHER fuse is applied through the switch contacts of the relay to the windshield washer fluid pump.