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Home >> Lincoln >> 2011 >> MKZ Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System & Washer System >> Description And Operation >> Diagnosis And Testing >> Pinpoint Tests >> Pinpoint Test F: The Washer Pump is Inoperative >> Normal Operation

Normal Operation

The multifunction switch provides a ground signal to the wiper/washer module through circuit CRW07 (GY/BN) when the wash function is selected on the multifunction switch. When the wiper/washer module detects this input, the wiper/washer module activates an internal washer relay that provides voltage to the washer pump through circuit CRW14 (BU/WH). The washer pump is grounded through circuit GD123 (BK/GY).

This pinpoint test is intended to diagnose the following: 

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