Durango 2WD V6-3.7L (2009)
Blower Motor Resistor: Description and Operation
Operation - Rear
OPERATION
The blower motor resistor for the rear heating-A/C system is connected to the vehicle electrical system through a dedicated wire lead and connector of
the rear heater-A/C wire harness. The rear blower motor resistor has multiple resistor wires, each of which will reduce the current flow through the
blower motor to change the blower motor speed.
The blower motor switch in the rear heater-A/C system directs the ground path for the rear blower motor through the correct resistor wire to obtain the
selected speed. With the rear blower motor control in the lowest speed position, the ground path for the rear blower motor is applied through all of the
resistor wires. Each higher speed selected with the rear blower motor control applies the blower motor ground path through fewer of the resistor wires,
increasing the rear blower motor speed.
The rear blower motor resistor cannot be adjusted or repaired and it must be replaced if inoperative or damaged.
