Wiper and Washer Systems: Description and Operation

Front Wiper and Washer


With the ignition switch in ON or START, battery voltage is applied through fuse 17 to the windshield wiper/washer switch, windshield wiper motor, and alarm and relay control unit.

Low Speed
When you push the wiper switch lever down to the second detent (LO), battery voltage is applied to the LO winding of the wiper motor, and the wipers run at low speed.

Park/Run
When you move the wiper switch lever to OFF, battery voltage is supplied through fuse 17 and the wiper motor, and alarm and relay control unit, and wiper switch to the LO winding of the wiper motor. When the switch on the motor reaches the PARK position, battery voltage is removed from the circuit, and the wipers stop in the PARK position.

High Speed
When you push the wiper switch lever down to the third detent (HI), battery voltage is applied to the HI winding of the wiper motor, and the wipers run at high speed.

Intermittent
When you push the wiper switch down to the first detent (INT), battery voltage is applied to the alarm and relay control unit. This momentarily energizes the alarm and relay control unit, applying battery voltage to the LO winding of the wiper motor which moves the wipers from the PARK position to the RUN position. After one sweep, the PARK/RUN function returns the wipers to the PARK position. The wipers make another sweep every 3 to 4 seconds.

Washer
When you pull the wiper/washer lever towards you, battery voltage is applied to the washer motor and to the alarm and relay control unit. The washer motor pumps fluid onto the windshield and the energized alarm and relay control unit applies battery voltage to the LO winding of the wiper motor through the wiper switch. The wipers will then run at LO speed until you release the switch.