Heated Glass Element: Description and Operation

With the Ignition Switch in RUN, voltage is applied to the Heater And A/C Control Assembly. When the Rear Defogger Control Switch is pressed ON, voltage is applied to the Rear Defogger Timer-Relay. The contact closes and provides voltage to the ON Indicator and the Rear Defogger. The rear window will become warm to remove the fog from the surface of the window.

The contact in the Rear Defogger Timer-Relay will stay closed until the Rear Defogger Control Switch is pressed again or the timer cycle is complete.

The first time the Rear Defogger Control Switch is pushed, the Defogger Timer-Relay will allow the Defogger to operate for approximately 10 minutes. Each time after the Rear Defogger Control Switch is pushed, the Defogger Timer-Relay will reset to operate for approximately 5 minutes. The Rear Defogger Timer-Relay will reset to 10 minutes when the Ignition Switch is turned OFF and then back to RUN.