Normal Operation
WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
Under normal operation washer pump motor is grounded through internal relays in the wiper motors using circuits 941 (BK/WH) and 946 (VT/LG). The multifunction switch provides input to the windshield wiper motor through circuit 1300 (VT) to activate the washer. The windshield wiper motor activates the internal relay and then provides power through circuit 941 (BK/WH). When the rear washer is activated, the internal relay in the rear wiper motor provides power through circuit 946 (VT/LG).