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Home >> Saturn >> 2007 >> Sky Red Line, Standard >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wipers System And Washer System >> Diagnostic Information and Procedures >> Windshield Wiper Washer System Malfunction >> Circuit/System Description

Circuit/System Description

Wash, Mist, Delay 1-5, Low, and Park are all low speed wiper motor functions controlled by the body control module (BCM). The BCM energizes the WPR 70 On/Off relay in order to operate the wiper motor at low speed. When energized, the output of the WPR 70 On/Off relay applies battery voltage through the WPR 52 high relay to the wiper motor.

The high speed wiper function operates independent of the wiper switch signal 1 circuit and any BCM output. During high speed wiper operation the windshield wiper switch high signal circuit directly energizes the WPR 70 high relay and also energizes the WPR 52 On/Off relay through the WIPER diode.

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