Heated Glass Element: Description and Operation

OPERATION
With the Ignition Switch in "RUN", the Rear Window Defrost Switch is powered through Fuse 5.

Pressing the momentary defrost switch "ON" closes the contacts of the Rear Window Defrost Relay and starts the ten minute (approximate) timing cycle. Current now flows to the Rear Window Defrost Grid.

When the Rear Window Defrost Switch is released from "ON", the solid state circuitry keeps the defrost relay coil energized.

Pressing the Rear Window Defrost Switch "OFF" turns off the defrost relay. This removes power from the Rear Window Defrost circuit.

If the "OFF" switch is not pressed, power will remain on until the time delay runs out. The coil will then deenergize and remove power from the Rear Window Defrost Grid circuit.