Grand Caravan V6-3.8L VIN L (2007)
Blower Motor Resistor: Description and Operation
Operation - Front
OPERATION
The front blower motor resistor is connected to the vehicle electrical system through a dedicated wire lead and connector of the front HVAC wire
harness. The front blower motor resistor has multiple resistor wires, each of which will reduce the current flow through the front blower motor to change
the blower motor speed.
The blower motor control in the manual temperature control system directs the ground path for the front blower motor through the correct resistor wire to
obtain the selected speed. With the blower motor control in the lowest speed position, the ground path for the front blower motor is applied through all of
the resistor wires. Each higher speed selected with the blower motor control applies the blower motor ground path through fewer of the resistor wires,
increasing the blower motor speed.
The front blower motor resistor cannot be adjusted or repaired and must be replaced if found inoperative or damaged.
