LS - Models

Voltage is applied at all times through fuse C-16 to the rear defogger relay contact. With the starter switch in ON or START, voltage is applied through fuse C-4 to the rear defogger timer/switch and the rear defogger relay coil.

When the rear defogger switch is pushed, a ground signal is sent to the rear defogger timer. The timer provides ground for the rear defogger relay coil. The rear defogger relay energizes and the relay contact closes. Battery voltage is applied to the rear defogger and the rear defogger indicator light. The indicator lights up and the rear defogger heats the rear window to remove any fog from the glass. The rear defogger will turn off automatically after approximately 20 minutes. It will also turn off if the starter switch is turned to OFF or if the rear defogger switch is depressed again.