2003 TJ 4.0 5spd. So the heater fan only works on the highest setting...nothing happening on the other three settings. Blower motor or the switch? Has anyone seen this before? If this is a common failure, it might save me some time on the troubleshooting side of things. Thanks.
The fan only working on high is normally due to a defective resistor pack. The resistor pack is used for all speeds except for the fan's highest speed where the resistor pack is bypassed. Your 2003 has it in a different location than my '97 does but yours should be somewhere up above the passenger side footwell. It's easily swapped.
Sweet! Thanks for the heads up! That definitely gives me a head start on the troubleshooting. I'll take a look at the service manual and see wherethe resistors are. I'm sure I can check the circuit with a DMM.
Gotcha. I wasn't expecting a bank of axial lead components but I wasn't sure what to look for either. Thanks. I expect it's a pluck and chuck situation.
The blower resistors are on the passenger footwell right behind the glove box on the blower housing. Mine problem ended up being the blower motor selector switch.
I have the same proble here as Hondarider... ONLY the high speed is working on my blower motor. I checked the switch selector with a multimeter, and I think the switch is ok..according to a continuity test.
I have 97 wrangler... I har it can be the resistor? Where is it? what does it lok like?
Thanks for your help
jake
i have a 05 TJ that is doing the same thing, only working on high, where could i get this relay and what is it called?? how would i got about checking the switch selector??
i have a 05 TJ that is doing the same thing, only working on high, where could i get this relay and what is it called?? how would i got about checking the switch selector??
I just went to the local parts store (advance auto) they had it in stock 20 bucks. I asked for the resistor pack and explained the problem and they gave it to me...two bolts and a plug later I have all four settings
I have a 97 too. Just changed out the resistor/rheostat for the blower last year. Here's a link with pictures. Blower Motor Resistor Install - JeepForum.com Just inside the passenger door under the glove box there's a black plastic kick-stop panel that's kind of a PIA to remove. After that it's a snap.
Could be a resistor pack, but I'd check the wiring to the HVAC controls in the dash...often times problems like that are due to melted wiring at the switch.
I too just lost all speeds but high. I could smell a slight electrical smell and thought, what is going???? But I read lots of these forums to know what it is. This forum is GREAT!!!!
2003 TJ 4.0 5spd. So the heater fan only works on the highest setting...nothing happening on the other three settings. Blower motor or the switch? Has anyone seen this before? If this is a common failure, it might save me some time on the troubleshooting side of things. Thanks.
I had the same problem in the fall. Only high speed would work, sometimes. I replaced the resister and that didn't work. I almost went the blower route but decided to replace the heater control assembly instead after reading some good posts on this AWESOME Forum. Glad I did it was a 30 min at most $90 fix. It turned out the vacuum switch was shot and the back side of the assembly was a little melted which I think caused the vacuum switch to sit in a bad position and fail. According to some of the jeep parts websites you can replace each one of the heater switches/selectors individually, just another decision you may want to consider. It only takes a few minutes to take apart the dash an take out the assembly. I was able to tell my issue as soon as unscrewed it from the dash. A little wiggle on that switch and everything worked as it was supposed to. You may even be able to wiggle that switch from the glove box. Good Luck!
My fan would only work on high and the switch from floor to defrost had stopped working also. Removing the leaves that had filled up in there fixed the switching from floor to defrost and the resistor fixed the speed control.
My jeep is doimg the same. Only works on the 4th setting. So i got all or nothing..literally. Hah so i was near autozone today and they said it was 45 bucks. Is that too much for one as i saw on here its a 20 dollar fix or so?
Nice. Now I know what has been the issue...and how to fix it :thumb:
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