Windshield Wiper System

Off/Low/High Speed/Interval
There are four distinct modes of wiper motion:
^ Off Mode: In this mode there is no windshield wiper motor activity and the windshield wiper motor will be in the PARK position.
^ Low Speed Mode: In this mode, the windshield wiper motor will be set to a low speed setting. The windshield wiper hi/lo relay is deactivated, while the windshield wiper run/park relay is activated.
^ High Speed Mode: In this mode, the windshield wiper motor will be set to a high speed setting. The windshield wiper hi/lo relay and the windshield wiper run/park relay are both activated.
^ Interval Mode: In this mode the windshield wiper motor will be set to a low speed setting with the windshield wiper hi/lo relay deactivated. The windshield wiper run/park relay is activated at the beginning of each wipe and deactivated when the windshield wiper motor park switch reaches the RUN position.

The permanent magnet three-brush F windshield wiper motor allows selection of either low or high speed, when selected via the steering column mounted multi-function switch. When the multi-function switch is in the LOW position, the common brush and low speed brush are used. When the multi-function switch is in the HIGH position, current bypasses part of the armature winding to the high speed brush. When the multi-function switch is moved to the OFF position, the windshield wiper motor will continue to run at low speed until the windshield wipers park.







When the multi-function switch is in the interval position, the windshield wipers will make a single sweep followed by a pause. The control knob on the end of the multi-function switch adjusts the pause from approximately 1-20 seconds.












Speed-Dependent Interval Mode
Vehicles equipped with a generic electronic module are available with the speed-dependant interval wiper feature. During the INTERVAL mode, the delay between successive wipes will decrease with higher vehicle speed to compensate for increased water on the windshield glass. This feature will relieve the operator of constantly switching between interval settings.







Mist Mode Operation
If the washer switch is pressed between 100 ms and 300 ms, with the mode switch in the off position, the wiper system will provide one low speed wipe with no wash.