Blower Motor Switch: Description and Operation

The blower motor is controlled by a rotary-type blower motor switch (6), mounted in the A/C-heater control (1). The switch allows the selection of one of four different blower motor speeds and includes an Off position.

The blower motor switch provides a ground path through the A/C-heater control. The blower motor switch directs the ground path through the appropriate blower motor resistor wires, as required to achieve the selected blower motor speed.

The blower motor switch is diagnosed using a DRBIII(R) scan tool.

The blower motor switch cannot be repaired and, if faulty or damaged, the entire A/C-heater control must be replaced.