The windshield wiper washer system consists of the following components:

Battery positive voltage is supplied to the windshield wiper motor and windshield washer pump. The wiper motor and washer pump are grounded through the control circuits and the windshield wiper/washer switch. Low speed, high speed, mist, and washer pump operation is controlled by the windshield wiper/washer switch by closing the control circuit contacts to the ground circuit contacts. The windshield wiper/washer switch also contains an interval relay which is supplied ignition voltage, ground, and the park switch signal. The interval relay controls delay operation, washer wipers, and the park function by grounding the windshield wiper motor through the low speed control circuit.