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Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System & Washer System >> Diagnosis And Testing >> Wipers and Washers >> Pinpoint Tests >> Pinpoint Test G: The Headlamps Do Not Illuminate When the Wipers are On >> Normal Operation

Normal Operation

The Smart Junction Box (SJB) sends a 12 volt reference signal on circuit CRW01 (WH) to the wiper motor module in order to monitor the status of the wipers. When the headlamp control switch is in the AUTOLAMP position and the wipers are on, the wiper motor module will pull the voltage reference signal low. After 3 seconds, the SJB will activate the headlamps.

This pinpoint test is intended to diagnose the following: 

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