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Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis (Single Page) >> Body & Frame >> Windows And Glass - Glass, Frames And Mechanisms >> Diagnosis And Testing >> Glass, Frames and Mechanisms >> Pinpoint Tests >> Pinpoint Test H: A Single Power Window is Inoperative - MKZ, LH or RH Rear >> Normal Operation

Normal Operation

The LH and RH rear window control switches receive voltage from the master window control switch when the window lockout switch is set to the UNLOCK position. Ground is also provided to the LH and RH rear window control switches from the master window control switch. The LH and RH rear window control switches transfer power and ground to their respective rear window motors. Window direction is controlled by reversing polarity of the voltage and ground circuits being supplied to the window motor.

When operating the LH or RH rear window from the master window control switch, voltage and ground is sent from the LH front window control switch through the normally closed contacts within the LH or RH rear window control switch to operate the LH or RH rear window. Window direction is controlled by reversing polarity of the voltage and ground circuits being supplied to the window motor.

This pinpoint test is intended to diagnose the following: 

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