Mustang V6-4.0L (2008)
Blower Motor Resistor: Description and Operation
BLOWER MOTOR RESISTOR
The blower motor resistor adjusts the blower motor speed based on the blower motor switch setting. The blower motor resistor contains 3 resistor coils
in series. The end of each resistor coil is wired to a setting in the blower motor switch. Voltage is available at the blower motor at all times when the
ignition is in the RUN position and the function selector is not OFF. The ground side of the circuit then continues to the blower motor resistor. The
blower motor switch will allow a path to ground with the addition of 1, 2 or 3 coils in the blower motor resistor to the circuit. When the blower motor
switch is in the HI position, the blower motor resistor is bypassed.
