Blower Motor: Description and Operation
MOTOR-BLOWERDESCRIPTION
The blower motor (1) is a 12-volt, direct current (DC) motor mounted within a plastic housing with an integral retaining tab (2), an integral wire harness connector (3) and a squirrel cage-type blower wheel (4) that is secured to the blower motor shaft. The blower motor wheel is positioned within the HVAC air inlet housing, which is mounted to the passenger side end of the HVAC housing.
The blower motor can be accessed for service from underneath the instrument panel.
OPERATION
The blower motor is used to control the velocity of air moving through the HVAC housing by spinning the blower wheel within the HVAC air inlet housing at the selected speed.
The blower motor will operate whenever the ignition switch is in the On position and the A/C-heater controls in any position except Off. The blower motor receives fused battery circuit through a fuse and a relay located in the power distribution center (PDC) whenever the ignition switch is in the On position.
Blower motor speed is controlled by regulating the ground path through or around the blower motor resistor and through the blower motor control located within the A/C-heater control.
The blower motor and blower motor wheel are factory balanced and cannot be adjusted or repaired. If faulty or damaged, the blower motor and blower wheel must be replaced as an assembly.