Rear Window Defogger Will Not Time Out Automatically
WARNING: This page is about a different car, the 1997 Lincoln Mark VIII and 1997 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.
Perform REAR DEFOGGER SWITCH test under COMPONENT TESTING. Replace switch if necessary. If switch passes test, check Brown/Light Blue wire between rear defogger switch and defogger grid for short to power.