Hi, im new to the forums and hoping for some help. I have a 97 cherokee sport that the blower motor doesn't work on. Tried changing the blower motor, control switch and relay, check fuses, all a no go. The only thing I can think of would be the blower motor resistor. Would this cause the blower motor not to work at all. I also checked the blower motor connector and it has no power going to it. I was also wondering which wire going to the control switch is the hot wire. Any help would be appreciated, thanks.

 

i just replaced the motor and resistor in my 90 a week ago. guy at the parts store said i should replace the resitor with the switch and i verified that on the forum.

 

I'm having the same problem on my 97 jeep I traced it all the way back to the ECU. So good luck

 

Yes the resistor can cause it not to work at all. Its not hard to replace and pretty cheap.

 

I agree that the resistor could potentially be the culprit here. It's truthfully a poor design and way too susceptible to moisture. It's located under the glove compartment screwed into the ductwork. You'll see a wiring plug stuck into a triangular black or grey module held in the duct with two screws. When it goes bad, it most commonly makes the fan speeds below high non operational.