Diagram for the placement of the fan blower motor in a 2003 Dodge ram 1500 truck

From autozone.com
2003-04 Vehicles

CAUTION On vehicles equipped with airbags, disable the airbag system before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in an accidental airbag deployment, possible personal injury or death.

NOTE The blower motor is located on the passenger side of the vehicle under the instrument panel. The blower motor can be removed from the vehicle without having to remove the HVAC housing.

1. Disconnect and isolate the battery negative cable.
2. Disconnect the wire harness connector from the blower motor.
3. Remove the three screws that secure the blower motor to the HVAC housing.
4. Remove the blower motor from the HVAC housing by rotating and tilting the blower motor as needed for clearance.
   

Fig. View of the resistor block screws (1), blower motor resistor (2), resistor block wire connector (3), blower motor screw (4), blower motor (5), blower motor wire connector (6), blower motor screw (7), HVAC housing (8), wire harness retainer (9), blower motor screw (10)

To install:

1. Align and install the blower motor into the HVAC housing.
2. Install the three screws that secure the blower motor to the HVAC housing. Tighten the screws to 20 inch lbs. (2.2 Nm).
3. Connect the wire harness connector to the blower motor.
4. Reconnect the battery negative cable.