Your truck has both. the resistor is between the switch & blower.thje resistor controls the blower speed
For the 1989 Dodge Ram, the heater blower motor resistor can be found on the passenger's side, on the bottom of the heater box. It is beside the blower motor.
Blower motor is under the dash on the passenger side.
Its located under the hood in the right hand cowl behind the windshield washer bottle.........
replace the blower motor switch
Underneith the Dash.
The resistor block or blower motor resistor is used to control the speed of the blower motor. That is how you get the lower speeds on your air conditioning or heater. The higher the resistance the lower the speed of the motor.
The resistor is under the passenger dash just left of the blower motor
Only for the high speed. The lower speeds are controlled with the use of a blower motor speed resistor.
I have been working on an issue with my 2002 Dodge Ram. The blower motor and resistor are both located on passenger side under the dash. Easily accessible in cab.
either the control head is bad or there is a blower motor resistor that is bad.
The blower motor speed resistor is burned out.