Heater and AC blower motor problems

[JDubz50]

Today when I was cruising around I noticed that my vents would not blow air no matter what setting I had it on. Now I was under the impression that if it only blew air on the high setting, that meant a bad resistor. But if it didnt blow any air at all, that meant a bad motor. So, I decided to pull the motor and resistor to see what was going on. I hooked the motor up to my battery and it seemed to work just fine. Im confused. Should I just replace the resistor or does this mean my problem is somewhere else? Here is a picture of my resistor:

The rust does concern me but not sure if that would be the cause blower motor failure since the motor is not blowing any air at all.
Please help!
Thank You.

 

[99FiveOh]

See if you get any power at the resistor. If so I'd put money on that being the problem. And as always, triple check the fuses!

 

[JDubz50]

I did check the fuses and they still looked good. How should I go about testing the resistor?

 

[99FiveOh]

Not sure on that. How much is a new one? Might be easier to get a new one and test it to see if it fixes the problem.

 

[JDubz50]

Yeah it is only like a $20-$30 part at oreillys. Ill just replace it anyways.

 

[revhead347]

The fan motor is definitely good. It's either the resistor or the fan switch. Do you have a multimeter or a test light? You should check to make sure it's not the switch. Use a test light or multimeter and test the plug that goes to the resistor. When you put the switch at a different speed, each speed should send power to a different lead on that plug.

Kurt

 

[JDubz50]

Thank you ill definately check the switch before picking up a resistor.

 

[JDubz50]

Still trying to get my hands on a multimeter... Im in the process of tearing to dash apart to get to the swtich wires. Ill let you know what happens when my buddy stops over with it.

 

[revhead347]

You can get a basic multimeter for $3 at Harbor Freight. At some point I eould make the investment, you won't believe how often you use it.

Kurt

 

[JDubz50]

You can get a basic multimeter for $3 at Harbor Freight. At some point I eould make the investment, you won't believe how often you use it.

Kurt

Yea I just realized today how cheap they are, I had no idea. I will definately be going to get one. I hope they are not to complicated to use... I know nothing when it comes to car electronics. Lol

 

[JDubz50]

Good news! Today I felt like taking the car to work but didn't want to drive it since it was a mess inside there with part of the dash and blower motor off so I just hooked everything back up. When I turned the air on, the vents were actually blowing air. I have no idea where the problem was since I checked all the fuses and control switch connections and all seemed well. Oh well. Hopefully it has been fixed.

 

[revhead347]

There are a huge number of functions on it, but you honestly only use a few. I use mine almost eclusively for voltage and continuity.

Kurt