Heated Glass Element: Description and Operation

With the Ignition Switch in RUN, voltage is supplied to the REAR DEFOGGER SWITCH at the Heater/HVAC Control Module. When the REAR DEFOGGER SWITCH is depressed. the contact closes, which provides voltage to the ON Indicator Light Emitting Diode LED and the Rear Defogger Grid. The Rear Windows will become warm to remove fog from the surface of the window.

The Solid State Time Delay will automatically turn-off the Defogger Grids and the LED at the end of approximately 10 minutes. The Defogger Grids are also automatically turned off if the REAR DEFOGGER Switch. Fog Switch is depressed again or the Ignition Switch is placed in OFF.

For the Suburban or Utility with Cargo Doors, the Defogger Grids can be energized only with the Cargo Doors closed.