Rear Window Defrost
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 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 Front Controls Interface Module (FCIM). For Fusion/Milan, the rear window defrost switch is integral to the HVAC module or the FCIM if equipped with navigation system. When the rear window defrost switch is pressed, the HVAC module will activate the rear window defrost relay located in the Battery Junction Box (BJB). When the rear window defrost relay is active, the rear window defrost grid will be energized.
The HVAC module will deactivate the rear window defrost relay when one of the following conditions is met:
- The rear window defrost switch is pressed when the feature is active
- Ignition switch state is changed from RUN to OFF/LOCK
- The 10-minute timer completes