Heated Glass Element: Description and Operation
Rear Window/Power Mirror DefoggerHow the Circuit Works
Rear Window Defogger
Battery voltage is supplied at all times through fuse 8 (in the under-hood fuse/relay box) to the rear window defogger relay contacts. With the ignition switch in ON (II), battery voltage is supplied through fuse 36 (in the under-dash fuse/relay box) to the rear window defogger relay coil and to the climate control unit.
When the rear window defogger switch (in the climate control unit) is pressed, the climate control unit provides ground for the rear window defogger relay coil, which energizes the relay. Battery voltage is supplied to the rear window defogger through the energized relay.
The rear window defogger is turned off by pressing the rear window defogger switch a second time or by turning the ignition switch to LOCK (0).
Power Mirror Defoggers
With the ignition switch in ON (II), battery voltage is supplied through fuse 36 (in the under-hood fuse/relay box) to the power mirror defoggers relay and to the climate control unit.
When the power mirror defoggers switch (in the climate control unit) is pressed, the climate control unit provides ground for the power mirror defoggers relay coil, which energizes the relay. Battery voltage is supplied to both mirror defoggers through the energized relay.
The power mirror defoggers are turned off by pressing the power mirror defoggers switch a second time or by turning the ignition switch to LOCK (0).