Pinpoint Test M: The Defrost System Will Not Shut Off Automatically - MKZ: Notes
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.
Refer to SYSTEM WIRING DIAGRAMS article, Heated Window for schematic and connector information.