2007 Toyota Tundra Owners Manual - Page 196

07 04.26 Back window and outside rear view mirror defoggers and front windshield de −icer (Crew Max models) To defog or defrost the outside rear view mirrors, push the switch. The ignition switch must be in the "ON" position. The heater panels in the outside rear view mirrors will quickly clear the mirror surfaces. An indicator light will illuminate to indicate the mirror heaters are operating. On some models, the front windshield wiper de−icer also operates simultaneously by this switch. On vehicles with the front windshield wiper de−icer, the front windshield wiper blades will be de−iced. Push the switch once again to turn the mirror heaters off. The system will automatically shut off after the defogger have operated about 15 minutes. Make sure you turn the mirror heaters off when the mirror surfaces are clear. Leaving the mirror heaters on for a long time could cause the battery to discharge, especially during stop−and−go driving. The mirror heaters 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. XS15034 Type A CAUTION Since the mirror surfaces can get hot, do not touch them when the switch is on. XS15035a Type B 178 2007 TUNDRA from Jul. '07 Prod. (OM34463U)