Rear Window Defrost
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
For MKZ, the rear window defrost switch is integral to the FCIM . For Fusion and Milan, the rear window defrost switch is integral to the HVAC module or FCIM if equipped with navigation system. When the rear window defrost switch is pressed, the HVAC module will activate the rear window defrost relay. When the rear window defrost relay is activated, the rear window defrost grid will be energized.