Defoggers - Rear Window: Operation

The rear window defogger operates only when the ignition switch is "ON". A spring-loaded 3-position switch turns the relay on, then returns to center position. The relay will stay on indefinitely on Granada, Monarch, Pinto and Bobcat models. On all other models, the relay will automatically turn off after 10 minutes. On all cars, the defogger can be turned off by moving the control switch to the "OFF" position, or by turning off the ignition.