Section 32 (Defogger - Rear Window System): Description
WARNING: This page is about a different car, the 1997 Mercury Sable and 1997 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
Principal components of the rear window defogger system are a heating grid on the inside of the rear window, Generic Electronic Module (GEM), defogger switch on integrated control panel and defogger relay.