When the ignition switch is in the RUN position, power is available to the heater and A/C controller's heated mirror solid state timer from HVAC I Fuse 21 through CKT 341 (BRN). Also power is available at all times to the heater and A/C controller's rear defogger relay contacts from HTD MIR Fuse through CKT 2267 (ORN). Depressing the heated mirror push-button on the heater and A/C controller starts the solid state timer, which actuates the rear defogger relay in order to apply voltage through CKT 2267 (ORN) to both of the outside rear view mirror heating elements. Because the heating elements have ground through CKT 1850 (BLK) (G202) and 1050 (BLK) (G205), both of the elements energize. When voltage is available to the rear defogger relay, the local light emitting diode (LED) indicator illuminates. The solid state timer nominally times for 10 minutes. After 10 minutes, the timer de-energizes the relay. Depressing the push-button again re-initiates the timed operation. The relay also de-energizes when the ignition switch is not in the RUN position.