1997 Toyota Supra Owners Manual - Page 66

Rear window and outside rear view mirror defoggers NOTICE Do not operate the wipers if the windshield is dry. It may scratch the glass. Make sure you turn the defoggers off when the surfaces are clear. Leaving the defoggers on for a long time could cause the battery to discharge, especially during stop-and-go driving. The defoggers are not designed for drying rain water or for melting snow. If the outside rear view mirrors are heavily coated with ice, use a spray de-icer before operating the switch. NOTICE To defog or defrost the rear window, push the switch. The key must be in the "ON" position. The thin heater wires on the inside of the rear window will quickly clear the window surface. An indicator light will illuminate to indicate the defogger is operating. On some models, the heater panels in the outside rear view mirrors will also quickly clear the surfaces. Keep you hands off the mirror faces when the switch is on. Push the switch once again to turn the defogger off. The system will automatically shut off after the defoggers have operated about 15 minutes. When cleaning the inside of the rear window, be careful not to scratch or damage the heater wires. 58