Blower motor resistor?

Hi:
Check to see if you have power to the blower motor resistor. If you do, replace the resistor. If you don't, check the switch for power in and out. If there is power in and not out, replace the switch. Here is a guide to help you step by step with instructions in the diagrams below to show you how on your car.

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

Check out the diagrams (Below). Let us know what happens and please upload pictures or videos of the problem.

I cannot find the resistor to check it. Would you know where it is? With the plug on the blower motor having power, is it a grounding circuit that runs thru the switch and resistor?

Hi Again:

If you have power to the motor, the resistor is good. If you have a digital volt meter, you could check for variations in voltage based on what speed the switch is on to make sure it's working properly. If you have power to the motor, but the motor won't run, it sounds like the motor is bad. You can remove it and run power to it to see if it runs outside of the vehicle to be sure.

Let me know what you decide.

Joe

As I stated before, I have already checked the motor and it runs fine. I am getting full voltage at the blower motor plug regardless of the position of the switch. At the blower motor plug there is a green wire and a blue striped wire. The green wire has 12+ volts all the time. When checking with a volt meter across the 2 wires (with the plug disconnected) I get no voltage. With the plug attached to the motor, I grounded the blue striped wire and the motor ran fine. As I stated before, could this be a grounding circuit where the resistor/switch act as a variable ground? Would that mean that the resistor is somewhere between the motor and the switch on the ground side of the circuit? I still have no idea where the resistor would be located so that I could check it to see if it needs replacing.

Hi Again:
Yes, the resister is between the motor and the switch. I just looked it up in the manual and the resister is on the passanger side interior under the dash. It is attached to the right side of the HVAC unit. If your not geting a ground through the wiring harness and have to run a seperate ground, the resister is the problem. Keep in mind, the switch redirects the 12 volts to different areas of the resister. Thus the resister is responsible for how much power the motor gets. See if you can find it. I think that is your problem.

Joe

Joe, Thanks for all of your help. I finally found the resistor, replaced it and now everything is working fine. It's the somewhat simple things in life that make you happy. Having heat again is one of those simple things. Your persistence and expertise is unparalleled and beats going to a repair station just to pay a lot of money to find a simple solution.

Hi Again:

I'm glad you got it fixed. Take care and stay warm. If you need anything in the future, let me know.

Joe
Positive feedback is appreciated.

The blower motor resistor wiring pigtail melted onto the resistor. I purchased a repair kit for the pigtail. It was a universal repair kit and has 3 wire sets. I used the set that appeared to be the same guage wire as the original wires.
Now the blower fan blows low on the low(1)and low/med(2) setting and medium on the med/high(3) and high(4) setting.

I plan on purchasing another resistor to see if that is the problem but also would like your opinion.

If the resistor melted your harnes, yes replace that too.

I replaced the wiring and resistor because they were melted together. I am having these problems with a new resistor and wiring.

OK at this point you need to have it scanned with a tool that can read the body "B" codes. The control unit may be no good...

hi my heater fan did not work on the low setting, but worked on the high setting,then didnt work at all.
I was told it could be the heater fan resiister Do you know where it is located ?

Bolted to the heater box, near the fan, usually with a pair of 5/16" bolts.

This system uses an unnecessary, unreliable, complicated computer to run the system. A bad controller is more likely.

caradiodoc

My heater only works on high spped, I was told I needed a new resistor, I am having trouble locating the spot in the vehicle where the resistor is located

The heater resistor card is located right under the glove box lower front left right over your left foot if you sit in the passenger seat you should see a 4 wire plugged into it. you need to remove 2 screws with a 1/4inch socket and you will have your resistor...

i cant find that little resistor coil (looks like a reastat) that is supposed to be on heater box under dash. heater fan works on bench,relay good,fuses good, but heater fan works when it wants to.

It should be located on the heater box. Here is a picture of what you are looking for:

Let me know if this helps. Joe

I'm having a short problem in the wiring harness at the plug it's burning the plug out in already replaced the resistor and put a pig tail on to replace the burnt out plug because the first time it had looked like a wire had been pulled out somehow and it shorted but now it's done the same thing is there any way if yall have it I can get a wiring digram or yall can tell me what the dark blue wire with a yellow stripe leads to so I can figure out what is causing this. No fuses have been blown so I don't know what could be causing this.

Which resister are you referring to?

It the one inside the cab directly under the glove box area

Is it for the blower motor (heater blower motor)?

Not sure with it out neither the a/c nor heater works

All ik is that the resistor is in the air system in the cab on the passenger side and I think the blow in motor is in the same area

Okay, that must be what it is. If it is melting again, chances are the blower motor itself is drawing too many amps and causing the wiring to heat up. Other than that, a poor connection can cause excessive heat. Make sure everything is clean and tight. However, my guess is the blower motor.

Hello there, been awhile, having an issue with my heating and AC system. So my blower motor won't spin. Took it out hooked it up to the battery and it spins just fine, changed out my heater resistor and still nothing, checked all my fuses they are good and checked my wiring and i am getting all the proper current. Not sure what to do from here, is there way to check my climate control panel? Not sure if that could be the issue. Let me know what i can do thanks

also no check engine light codes are on at all

If you have already checked fuses, check to see if there is power to the switch. If there is, the power must be lost between that point and the blower motor.

Let me know what you find.

So it ended being the ignition switch we replaced it about a 26.00 dollar part pretty easy to do, seemed there was a short in there or something, hope this helps someone else out thanks for the help

I have to be honest, I never suspected that. I'm glad you got it fixed.

If I set the blower at any of the three lower levels it will not come on. I have to set it to high so it will turn on.

Someone told me it may be the blower motor resistor?

Yes, although the high speed doesn't use a resistor, it's wired through that assembly. The resistor assembly is on the ground side of the blower motor, I can't rule out the heater control.

do you have an image of the spot or part to replace?

Hello, the procedure was changed from 2000 to 2001. I have a procedural picture for 2000 but not 2001.

According to the partsbook, the resistor looks like the above picture.

Heater problem
2001 Dodge Dakota V8 Four Wheel Drive Automatic

My '01 Dakota keeps blowing the resistor and the motor will only run on the highest setting any suggestions as to where I should look to repair this?

first things first. check to see the condition of the heater motor. if its too high then the resistor will keep blowing. try putting a small amp fuse in. what happens to it? are you going with cheap aftermarket parts or a good stepped resistor oem quality

I just bought a replacement resistor for my blower motor. I am assuming based on research that its location is somewhere behind - or under - the glove box. Can I replace this without pulling the entire dashboard, and if so, how?

Hi
Yes behind glove box can remove box to access just left of motor in air plenum. No need to pull dash. What is problem high speed only?
Hope this helps
Thanks for donate

Thanks, this is the help I needed. Blower problem progressed in steps- first, only two speeds, then one, then none.

When you get to resistor check voltage from switch

My blower motor stopped working. I tested the fuse, blower and climate control switch. All appears to be working fine. I think I have a problem with the blower motor resistor; however I can't locate it.

It is suppose to be on the passenger side of the truck under the dash according to the manual.
I pretty much took the dash apart but still can't find it. Can you help me locate it?