Grand Cherokee 2WD V8-5.2L VIN Y (1998)
Blower Motor: Description and Operation
Blower Motor
The blower motor and blower wheel are located in the passenger side end of the heater-A/C housing, below the glove box module. The blower
motor controls the velocity of the air flowing through the heater-A/C housing by spinning a squirrel cage-type blower wheel within the housing at
the selected speed. The blower motor and blower wheel can be serviced from the passenger compartment side of the housing.
The blower motor will only operate when the ignition switch is in the On position, and the heater-A/C mode control switch knob is in any position,
except Off. The blower motor circuit is protected by a fuse in the junction block. On models with the standard manual temperature control system,
the blower motor speed is controlled by regulating the battery feed through the blower motor switch and the blower motor resistor. On models with
the optional Automatic Temperature Control (ATC) system, the blower motor speed is controlled by the blower motor power module, which
adjusts the battery feed voltage to the blower motor based upon an input from the blower motor switch through the ATC control module.
The blower motor and blower motor wheel cannot be repaired and, if faulty or damaged, they must be replaced. The blower motor and blower
wheel are each serviced separately.
