Just bought my first Jeep Thursday, 2001 Wrangler Sport. Had hard blowing cold air until yesterday afternoon. Started vehicle and was blowing, but when I changed the setting it just shut down. All fuses and basic checks appear OK. Pulled the blower and have voltage at connection so I assumed the blower went out. Bought a new blower and still does not blow.
Any ideas? Thanks
if blower is good--and have current at plug to blower--why doesn't blower work?
You say voltage at connection--reconfirmed after new blower install? Could check resistor---cheaper to purchase but harder to change than the blower motor. I would double check blower motor by jumping direct at battery--just long enough to know it works or not.
I blame the switch at frist guess based on your description--but would verify motor good and voltage at plug and variable.---if not switch or resistor?
I just fixed my blower motor on a 98 sahara. I found that the wiring diagrams for the fan wiring in the haynes manual was slightly off. I had two separate issues. 1 issue was the blower resistor, which fixed the blower for fan speeds Lo, M1, and M2 (a simple replace once you locate it). For fan speed Hi (it has a separate power feed) i had to find a break in the wire, which happened to be located below the main fuse panel. i had to butt splice a section of new cable. If you have voltage at the fan, you probably not having an issue at either of these areas
What I would recomend is to check the blower relay and make sure it is receiving voltage as it should at each of the fan speeds, if it does, test the relay itself, if it is functioning properly,the issue is down stream and you should test the fan speed switch for voltage. Keep in mind the flow of power direction when you are testing voltages.
Fyi - for future reference, test the blower motor before replacing. Once removed use some jumper cables to the battery.
Problem was similar to what you are experiencing. When my air stopped working (May of this year) I checked the fuse, pulled the blower motor and tested it with the battery, I replaced the resistor and still did not work. Come to find out it was THE BLOWER CONTROL SWITCH only about $25.00 +tax at local dealership (dealer item only). That’s the one that controls the fan speed. So I bought one took it home and installed it no problem air worked great for one month. Then in the middle of traffic ON JTB in Jacksonville FL. Yea the air went out on and on a 100 degree day. It got warm real quick. Went back through all the steeps thinking it was something different. After all it was a new part. No it was the blower control switch again. So I bought another think maybe it was a bad batch. After all it’s only $25.00. I installed the switch and the air worked great again until last week. This is switch number two. So I started digging into the forum a little more I found this link someone else posted. However I cannot find the original post. Anyhow here is the link Jeep Fire Prevention - Jp Magazine. This article talks about dash fires that are related to TJ model jeeps because of the blower control switch and how to fix it. I was just at the dealership today 7/25 . Before I went to the dealer ship I went on the Home | National Highway Traffic Safety Administration (NHTSA) to see if there are any recalls for this type of problem. There are several complaints on file but no recall. Called Chrysler and they said that they were not aware of any problems. Of course not. So, before my Jeep burns to the ground because of a dash fire I’m going to install the relays and hope that helps.
I hope this helps you.
I had a similar problem, but turned out I had bought a defective blower switch, soIahd to get antoher one. It's much cheaper than getting another blower, and parts do sometimes come defective new. Thats my vote- hope it helps!
I am really stumped now. I have replaced the blower, the switch and the resistor but still no luck. Is there a hidden relay or something? Maybe a fuse I am missing?
OH WOW--now I am confused thought for sure what you had done would fix it----does wiring have current??? Sorry stupid question-if had current and blower is new and not working than obviously blower would work or brand new blower is bad.
PITA!!!! but sounds like time to start checking with a trouble light. Gotta get the power/current from battery/switch relay/resistor to motor. Good Luck!!!