2005 Subaru Legacy Owner's Manual - Page 229

Instruments and controls To turn on the defogger, push the button. To turn it off, push the button again. The indicator light located on the button lights up while the rear window defogger is operating. Your SUBARU dealer can set your rear window defogger for continuous operation. Contact your SUBARU dealer for details. Once the rear window defogger has been set for continuous operation, the rear window defogger repeatedly operates for 15 minutes, stops for two minutes, and again operates for 15 minutes. If the battery voltage drops below the permissible level, continuous operation is canceled and operation stops as described below. " If the battery voltage drops below the permissible level within 15 minutes of depression of the button, continuous operation is canceled and the rear window defogger stops operating 15 minutes later. " If the battery voltage drops below the permissible level after the rear window defogger has, following depression of the button, operated for 15 minutes, stopped operating for two minutes, and started operating again, the rear window defogger immediately stops operating. " Do not use sharp instruments or window cleaner containing abrasives to clean the inner surface of the rear window. They may damage the conductors printed on the window. " To prevent the battery from being discharged, do not operate the defogger continuously for any longer than necessary. NOTE If your vehicle is equipped with the outside mirror defogger, the outside mirror defogger operates while the rear window defogger is operating. 3-58