A good sign the blower motor resistor for the air conditioner and heater on a car has gone bad is when the fan will only work when the dial is set on high or set on low, but not when you set it on the other settings. The resistor is an easy part to replace and you don't have to be a mechanic to do it. If you are the owner of a 1982-92 Camaro Iroc-Z and the blower motor is not working on all fan settings and you want to replace it yourself, here is how you can do it.

You Will Need:

  • New Blower Motor Resistor
  • 7mm Wrench  
  • 7mm Socket
  • Ratchet
  • Socket Extension

Blower Motor Resistor Location

Open the hood of the Iroc-Z and look at the passenger side of the engine. The blower motor resistor is located in the back part of the engine compartment near the windshield. You will see the black housing for the blower. The resistor is on top of the blower motor next to the housing for the fan. There are wires connected to two gray clips attached to the blower motor.

Remove the Resistor

Pull the electrical connectors off of the resistor. There are a couple of 7mm bolts that attach the resistor to the blower motor. Start to remove the back nut with a 7mm box wrench. There is a cable running along the back of the resistor that makes getting a socket on this bolt hard to do and it is easier to use a box wrench to get it started. Once the bolt is loosened a little, you will be able to put a 7mm socket on the bolt. You'll need to put a short socket extension on the ratchet to reach the bolt. Take out the bolt. Remove the front bolt with the socket and ratchet. Lift the resistor up and remove it.

Install New Resistor

Insert the new resistor into the space of the old and bolt it to the blower motor fan. Reconnect the wire connectors to the top of the resistor.

Note: This is the same type of resistor used for many different makes and models of cars made by Buick, Chevrolet, Pontiac, Oldsmobile, and GM vehicles made in the late 1970s to the early 1990s. So, you don't need to find a resistor made especially for a Camaro Iroc-Z.

Test Resistor

Turn on the Iroc-Z and adjust the fan speeds on the blower motor. The blower should now work at all the different settings. Turn the car off and shut the hood.

If you don't want to perform this auto service yourself then contact GSBP Automotive for help.