1996 Ford Mustang Owner's Manual - Page 83

To heat the inside of your vehicle and defrost the windshield and side windows at the same time, turn the SELECT knob to MIX, turn the TEMP knob into the red range, as required, and turn the FAN knob to the desired speed between LO and HI. On mild days you may want to ventilate your vehicle with outside air. Turn the SELECT knob to VENT, turn the TEMP knob to the end of the blue range (full left) and turn the FAN knob to the desired speed. Air will be delivered through the instrument panel registers. Under normal conditions, the SELECT knob should be left in any position except OFF when the vehicle is parked. This allows the vehicle to "breathe" through the outside air inlet duct. Rear Window Defroster (If equipped) The defroster for the rear window clears frost, fog, or thin ice from both the inside and outside of the rear window. The button for the rear window defroster is located on the left side of the instrument panel below the headlamp switch. The button that controls the rear window defroster 83