Rear Defogger and Heated Mirrors

When the Ignition Switch is turned to "RUN," voltage is applied from I/P Fuse #11 to the Heater and A/C Control. When the Rear Window Defogger Switch is pushed to "ON." voltage is momentarily applied to the Rear Window Defogger Solid State Timer through CKT 39. When voltage is applied to the Rear Window Defogger Timer, the Solid State Timer will close the internal contacts. The internal contacts remain closed until the defog cycle is complete or the Rear Window Defogger Switch is pushed "OFF."

When the internal contacts of the Rear Window Defogger Switch are closed, voltage from I/P Circuit Breaker #4 is applied to the indicator and to CKT 293, the Rear Window Defogger Grid and I/P Fuse #44 if equipped with Heated Mirrors.

The Heater and A/C Control contains an internal timer to control the time the internal contacts are closed. When the Ignition Switch is turned to "RUN" and the Rear Window Defogger Switch is pushed to "ON" for the first time, the defog cycle lasts 10 minutes. Further operation will result in 5 minute defog cycles. The defog cycle is reset to 10 minutes when the Ignition Switch is turned to "OFF" and back to "RUN."