2nd Gen Non-Engine/Transmission Heater fan #1, #2, #3 selector stopped working

[Dodoro]

Fired up the truck yesterday morning (Up here in Detroit), put the fan on #4 with defroster on and my radio made the weirdest sound. I verified the radio was turned off. The sound was kind of static - squealing, maybe 3-4 seconds long. Then I realizer the fan would only run one speed (#1) in the first three speeds. High #4 works fine. Guess I need to pull the switch and clean / replace this switch. Any help is greatly appreciated. Any idea on the cost of a new switch.

 

[RDHamill]

I'd guess that it's not your switch, you might try looking at the resister under your dash. It is basically a voltage divider used to supply the heater fan with different voltages for the different speeds.

It's usually a simple plug in item, but I have seen them melted in.



good luck

 

[BarryG]

I also would replace the resisitor. It is a five minute job. I have had the samething on mine and it was the resisitor.

 

[Dodoro]

Thanks, BarryG, and RDHamill. I"ll look for the resistor. Any tips on locating it.

 

[TWilkening]

If you look under the dash on the far right, you will see the housing for the blower fan. The resistor is right there with it. It has a couple bolts and a plugin. If your fan was making a little noise, you might take a little light oil (motor oil) and lubricate the bushings in the fan. I've had a couple of these resistors go out, and I think I need a new blower motor.

 

[liberty]

I just had to replace the resistor block on my mothers 2004 caravan. I was able to use a jumper wire to get the fan working while the dealer was ordering it.

I was looking up these resistor blocks on the web and I found literally hundreds of posts for minivans with failed resistor blocks. It wouldn't surprise me it was a similar design to what is used in out ctd's.

With a jumper wire and a test light you should be able to get your fan working and diagnose if it is in fact a failed resistor block.

It was -34 celsius here last week. Thats -29 fahrenheit.

No fun to have the blower motor go out on you!

 

[Ragain]

Be aware that if your fan is about to go out, it will burn up a new resistor in a short time. So while you are under the dash... . might as well pull the fan motor also!

 

[Thomas]

Part Numbers, etc.

. . . Any idea on the cost of a new switch.

There is one resistor block:

P/N 5012921AA


There are four heater controls (switch - varies with equipment):

P/N 5015734AA
P/N 5015735AA
P/N 5015736AA
P/N 5015737AA

Look up prices at: http://allchryslerparts.com/

 

[Dodoro]

Thanks alot: Thomas, Ragan, liberty,TWikening, you're all a big help... ... .

 

[TWilkening]

Be aware that if your fan is about to go out, it will burn up a new resistor in a short time. So while you are under the dash... . might as well pull the fan motor also!

This is what happened to me. I changed the resistor, and the fan worked fine for about a month, when the resistor burned out again.

 

[jkidd]

I resoldered the resistor. works now

 

[T.Banttari]

My fan started squealling, on and off, months ago, and the resistor network burned out so it only ran on high. I put a new resistor network in (a dealer part), and things worked great at all the speeds. It only lasted three days, and now the resistor network burned out again. I wish I had read this thread and replaced the fan motor at the same time.

 

[GAmes]

If you have a u-pull-it yard near you check them out. All 2nd gen, 1500 to 3500s use the same fan and resistor so the are easy to find. I paid $5 for the combo here.

 

[greenearth2]

I had same problem, replaced the resistor on my 98, took about 10 min. Local Dodge dealership charged me $115 for a "heavy duty resistor". Probably made in China for a few bucks.