Blower Switch
WARNING: This page is about a different car, the 1995 Ford Pickup, 1995 Ford F-Super Duty, 1995 Ford Cab & Chassis, and 1995 Ford Bronco. However, it is still accessible from the selected car via links, so may be relevant.
Three of 4 operating speeds (low, medium low and medium high) are controlled by a heater blower motor switch resistor connected in series with 3 of the operating positions and ground. See Figure .