Rear Window Defrost
WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
The rear window defrost switch is part of the HVAC module located in the instrument panel. When the rear window defrost switch is pressed, ground is provided to the rear window defrost relay coil. The rear window defrost relay supplies voltage to the rear window defrost grid.
The SJB 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 15-minute timer completes