Blower Motor Switch: Operation
WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
The blower motor switch provides a blower motor ground path through the A/C-heater mode control switch. The blower motor switch directs this ground path through or around the blower motor resistor wires, as required to achieve the selected blower motor speed.
The blower motor switch cannot be repaired and, if faulty or damaged, the entire A/C-heater control must be replaced. The blower motor switch knob can be serviced separately.