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Old 05-26-2011, 08:29 PM   #1
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Blower not working

Recently the fan on my 2001 TJ stopped. It does not work on any speed or on heat or A/C. I pulled the blower motor and straight wired it to the battery. It worked. I also pulled the speed selector switch. I ohm the switch. It appeared to be ok. I also jumped the connector... nothing. I had 13 volts on the speed selector connector. I checked the resister. It appeared and ohm good. It seems like it should just be a fuse, but all I can find are good. I'm started to get anoyed. I really love my TJ, but this humid Tennessee spring has me thinking about a Prius! Help!
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Old 07-13-2011, 09:51 AM   #2
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I have a 2000 TJ, and one fan speed doesn't work. Odd. I'll repost if I figure it out.

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Old 07-13-2011, 10:14 AM   #3
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I had the same problem here is what I did. I replaced the resistor, didn't work. I replaced the selector switch worked. For giggles I put the old resistor back in, didn't work....scratch head...put new resistor back in, worked. So replace both the resistor and selector switch. I have a new blower that I bought but don't need if you need it.
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Old 07-13-2011, 10:56 AM   #4
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Quote:
Originally Posted by acAZjeep View Post
I have a 2000 TJ, and one fan speed doesn't work. Odd. I'll repost if I figure it out.
When just one fan speed doesn't work, that is typically caused by the resistor pack.

When no fan speeds work, it is probably the fan speed switch or a fried wiring harness as happens on older TJs.
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Old 07-13-2011, 11:17 PM   #5
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Blower?

My 01 the number 2 speed didnt work it was the blower switch.
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Old 07-17-2011, 04:40 PM   #6
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Originally Posted by acAZjeep View Post
I have a 2000 TJ, and one fan speed doesn't work. Odd. I'll repost if I figure it out.
I replaced the motor resistor and the problem persists. I then replaced the switch on the dash (see pic), and all 4 setting works.
I put the old resistor back in, and all 4 still work.

Ended being a $25 part from the dealership. Not bad.
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Old 07-21-2011, 06:17 PM   #7
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Fan speeds. Only highest speed works.

Glad I found a thread that is related to my problem.

I have a 97 TJ and just got back inside after trying to solve the blower fan problem, so came directly on the forum looking for an answer.

My fan is the 4 speed knob and climate control is the old slider type bars.

My first 3 speeds don't do anything and the 4th one is full blast.

I just replaced the 4 speed switch and have the same problem.

I'm reading about a resistor (or resistor pack?). Where is this located? Would like to try changing that next.
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Old 07-21-2011, 07:47 PM   #8
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The '97 TJ's resistor pack is up above the passenger-side footwell, screwed to the HVAC plenum with two screws. Remove the kick plate to gain access to that area. I wouldn't be surprised if you find some melted wiring leading to the resistor pack, that's a common issue with early TJs. If that's what you find, you'll need to splice in new wiring and install a new resistor pack. It happened to my '97.
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Old 07-21-2011, 09:07 PM   #9
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Had the same issue on my (new to me!) 04.

Replaced the resistor ($20 off eBay) and now allnfour settings work like new!
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Old 07-22-2011, 05:41 AM   #10
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Thanks!
I'll take a look at it this morning.
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Old 07-22-2011, 09:02 AM   #11
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OK. Got out there this morning before the temp hits 100+ today (we may break some records) and checked all the fuses (good) and the wiring for any melting (none).

Then removed the resistor. Seems there is just the slightest bit of rust and just an iddy-bit of foreign matter on/in it.

I'm thinking - maybe - this might be the problem.

I've included some pics to show you that I'm being sarcastic. I was pretty shocked when I saw it. I bought the Jeep last year and am just noww getting to all the little things on it that don't work, or don't work correctly. I'm pretty well finished with the major issues.

My question is now this...

I'm unfamiliar with parts manufacturers and found 2 being offered on feeBay. One is SMP and the other is Dorman/Techoice. SMP is half the price of Dorman.

Any real difference to a part like this? Or is one manufacturer head and shoulders above the other? I like to save money, but not if it means buying a part that is useless in a month.

By the way, thanks for the previous help in locating the problem with the blower speeds.
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Old 07-22-2011, 07:16 PM   #12
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I've not heard of those brands. I got the part at AutoZone (Duralast brand), and it was in-stock and around $40.
See link:
A/C Heater Blower Motor Resistor | AutoZone.com

And yeah...that part is gnarly!
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Old 07-25-2011, 06:18 PM   #13
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I ended up ordering the Dorman/Techoice off of feeBay for $21.00 delivered. AutoZone wanted $42 + tax. Would have ended up being about $45.

Came in today and installed. Working like a champ.
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Old 08-10-2011, 10:52 AM   #14
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I'm iffy ordering this thru ebay, but it doesn't seem to be that more expensive at the local autoparts store.
A/C Heater Blower Motor Resistor | 2002 Jeep Wrangler 4WD 6 Cylinders S 4.0L SFI | AutoZone.com
Advance Auto Parts: Search Results for blower resistor
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Old 09-19-2011, 06:28 PM   #15
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Sorry if this is already answered in here, but I didn't get it. So my question is if the blower motor stopped working all together, should I start by replacing the resistor or the control panel?
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Old 02-12-2012, 04:01 PM   #16
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Jerry - You had mentioned that if the blower fan simply didn't work at all you should look into replacing the switch plug. I have replaced the switch and the resistor and still no fan. Both of the fuses (behind the glove box and under the hood) appear to be working. Where can I find the blower fan to test it?
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Old 02-12-2012, 06:07 PM   #17
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Newbie Jeep owner here - 2000 TJ w/2.5. Got the TJ for a song, replaced engine with a rebuilt one then had the blower motor problem (high speed only and no speed) when it was all back together. Followed the great advice on this forum and replaced resistor, blower switch, then control module (that had the burned wires) then no speed at all. Did the rewiring thing with the pig-tail still no change. Finally tapped on blower motor and it ran. Replaced blower motor and it ran OK then ran at high speed without the select switch being on. Examined the plug at the blower motor and found it a little corroded - cleaned it and everything works fine.
Had 2 occasions when the blower motor just started running on high since then and wiggled the plug at the motor to stop it.
I picked up another connector at the bone-yard from a Cherokee and have it on hand if the problem reappears or persists.
Now I am wondering if all I needed in the first place was the plug for the blower motor though I am not upset about the control module because the connector was burnt and some plastic was melted.
Bottom line - my recommendation is to check the connector at the blower motor as an early step in the troubleshooting process. It is only 2 wires and maybe the 12V for the motor is getting a direct ground through the connector or not which could be the source of some problems.
Now off I go to get used to or improve the handling on this TJ with 31X10.50 tires. At least I have heat now.
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Old 11-21-2015, 06:36 PM   #18
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Having the same problem here with my TJ 2001. Took out the controls and the blower started working except for the speed #2. I'm looking for the speed control switch only without any luck yet. Now I noticed that is blowing air only to the windshield (defrost) and no matter in which position continue blowing air only to the windshield. Now I have 2 problems, find the speed control switch and figure why didn't change to the front air conducts.
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Old 02-27-2016, 09:54 PM   #19
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I've looked around and the 97-2004 blower speed control switch seems to be fairly common. It doesn't look like it will fit the 2005-2006 LJ dash unit. I pulled the switch today and took it to autozone and they found nadda. Does anyone have the OEM part number for the 2005-2006 Blowers speed control switch or the OEM equivalent? Figuered I'd start here. Lost #1-3 positions - blower works in #4.
Thanks
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Old 02-28-2016, 12:28 AM   #20
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Quote:
Originally Posted by JYJeep View Post
I've looked around and the 97-2004 blower speed control switch seems to be fairly common. It doesn't look like it will fit the 2005-2006 LJ dash unit. I pulled the switch today and took it to autozone and they found nadda. Does anyone have the OEM part number for the 2005-2006 Blowers speed control switch or the OEM equivalent? Figuered I'd start here. Lost #1-3 positions - blower works in #4.
Thanks
Look at the elect connectors on the switch, the blend switch VERY CAREFULLY. Think you'll find connectors melted n shorting. Very common as blower motor ages n draws excessive current. Mopar of course, has a retrofit for those connectors ! Lol.
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Old 02-28-2016, 07:55 PM   #21
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Thanks, I'll double check. but ok we still have no known replacement part for the '05-06 switch.
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Old 05-19-2016, 10:52 AM   #22
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Hey guys, reviving an old thread, but I believe I have the same problem. My '01's fan was working perfectly yesterday morning. Then when I got in for lunch it stopped. I assume it is the switch everyone is talking about. What I don't know is how to replace it... I assume it is just the switch part the little control knob connects too.

And what about where the resister is and how to replace that?
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Old 05-19-2016, 07:05 PM   #23
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Quote:
Originally Posted by Kayzar View Post
Hey guys, reviving an old thread, but I believe I have the same problem. My '01's fan was working perfectly yesterday morning. Then when I got in for lunch it stopped. I assume it is the switch everyone is talking about. What I don't know is how to replace it... I assume it is just the switch part the little control knob connects too.

And what about where the resister is and how to replace that?
No speeds at all now?
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Old 05-20-2016, 09:45 PM   #24
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Quote:
Originally Posted by Kayzar View Post
Hey guys, reviving an old thread, but I believe I have the same problem. My '01's fan was working perfectly yesterday morning. Then when I got in for lunch it stopped. I assume it is the switch everyone is talking about. What I don't know is how to replace it... I assume it is just the switch part the little control knob connects too. And what about where the resister is and how to replace that?
The resistor is like $20 bucks at NAPA. They should tell you how to do it. Remove the glove box. This is a very easy fix. If I remember correctly, it's only connected by 2 screws.
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Old 06-14-2016, 08:27 PM   #25
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OK guys, bumping this thread again.

2000 Wrangler Sahara

I had my daughter's evap core replaced and a few days after her blower motor stopped working on all speeds. I've replaced the resistor previously, so I went to the switch... no luck. However, the blower would kick on sometimes if I messed with the connector some, so I cut off the connector and crimped on some spade connectors, still nothing.

We tapped on on the switch and it started working somewhat, so I replaced the switch again, still nothing... where should I go from here?
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Old 06-17-2016, 10:13 AM   #26
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Originally Posted by cubsfan5150 View Post
OK guys, bumping this thread again.

2000 Wrangler Sahara

I had my daughter's evap core replaced and a few days after her blower motor stopped working on all speeds. I've replaced the resistor previously, so I went to the switch... no luck. However, the blower would kick on sometimes if I messed with the connector some, so I cut off the connector and crimped on some spade connectors, still nothing.

We tapped on on the switch and it started working somewhat, so I replaced the switch again, still nothing... where should I go from here?
How are all of the connectors at the switch panel? Look closely at conns n wiring. Melted at all? Very common problem. As usual Jeep has a retro fit for them!

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Old 06-17-2016, 10:53 AM   #27
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I've had similar problems as everybody else and replaced switch, resistor, tested motor. The problem was the squirrel cage on some of these motors will creep toward the end of the motor shaft them start rubbing on blower housing, Motor will not run if this happens or will run intermmitent, If you leave on it can start frying wires, I ended up pushing squirrel cage back to proper position and epoxied in place. As a general rule you need to check if squirrel cage is hitting housing anywhere when you screw it up with the 3 screws. If I tighten mine all the way it hits housing so I put washer between screw and housing for clearance. Most of these fans are cheap sh^&, I'm currently looking for a better blower, Mine currently works fine and it was never the switch or resistor cause I put the old ones back in and it still works on all speeds.
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Old 06-25-2016, 06:20 PM   #28
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Hey guys, reviving an old thread, but I believe I have the same problem. My '01's fan was working perfectly yesterday morning. Then when I got in for lunch it stopped. I assume it is the switch everyone is talking about. What I don't know is how to replace it... I assume it is just the switch part the little control knob connects too.

And what about where the resister is and how to replace that?
Okay. So. I replaced the fan speed control switch in the dash (super easy fix, btw). All 4 speeds working fine for a bit.

Then air would only blow out of the defrost vents on engine load. Crack in the vacuum line on the part under the battery. Fixed that. Working fine.

Now the fan totally shuts of on the highest setting. Figured it was the blower resistor. Replaced that just now. Everything else still works the same. But max speed still doesn't work... Any guesses what I should check next? Is it possible the fan speed selector switch I got was faulty? The max speed setting was slowly giving out over time. First it would usually stay on. Then I had to switch from 4 to 3 to 4 again for it to work for a bit. And then 4 just died completely.
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Old 08-15-2016, 10:00 PM   #29
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How are all of the connectors at the switch panel? Look closely at conns n wiring. Melted at all? Very common problem. As usual Jeep has a retro fit for them!

Attachment 3110089

Attachment 3110097

Melted connector. Yup, that's exactly what I have on my 2001 TJ. For me it's the connector all the way on the right--the one that's not directly connected to a switch. Wiggle it a little and the fan works. Let go of it and no fan.

info4tim, you mention that Jeep has a retro fit. Is there a part number or specific name for this retro fit that I can look up or ask for at the dealership?

Thanks

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