RAM 1500 Truck 4WD V8-5.7L VIN D (2005)
Blower Motor: Description and Operation
The blower motor (1) is a 12-volt, direct current (DC) motor mounted within a plastic housing with an integral wire harness connector (2) and squirrel
cage-type blower wheel (3) that is secured to the blower motor shaft (4). The blower motor wheel is located in 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.
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 blower motor control in any position except Off. The blower
motor receives a fused battery feed circuit through a fuse 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 block 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.
