Rear Window Defogger Fan: Operation

Fan operation is controlled by a multiple position switch. Switch may be turned to any of its speed positions and air will be drawn through fan and onto rear window. As switch is moved from high to lower speed positions, resistance is added to motor feed lead, thereby lowering fan speed.

Fig 1: Wiring Diagram Of Rear Window Defogger Fan Circuit With Resistor In Control Switch

Courtesy of NOT AVAILABLE

Fig 2: Wiring Diagram Of Rear Window Defogger Fan Circuit With Resistor Or Resistance Wire In Circuit

Courtesy of NOT AVAILABLE