Normal Operation
WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
The wash/wipe function is activated when the windshield wiper motor module (internal) receives a reference signal through circuit 8-KA7 (WH/VT). When the multifunction switch wash button is pressed for longer than 0.25 seconds, the windshield wiper motor cycles, sending battery voltage through circuit 75S-KA7 (YE/VT) to the washer pump motor. When the wash button is pressed for less than 0.25 seconds the windshield wiper motor cycles only once, which is considered the mist position.