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Old 05-09-2010, 08:54 PM   #1
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Heat & Air?

Newbie here, I just realized my 99 has a major issue with the blower. I thought it was normal for the little difference in 1-4 on the fan settings until I got in my brother-in-laws 98. Any help on what to check first? Oh and after no wave-backs for nearly two months, got my first today! Now I feel accepted

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Old 05-09-2010, 08:55 PM   #2
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common problems in the blower motor resistor, give a little more description of how the blower is working.

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Old 05-09-2010, 09:10 PM   #3
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Well, it may not be doing anything. If your idling, very little comes out, once moving you get some flowing, but like I mentioned, 1 or 4, little difference.
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Old 05-09-2010, 09:39 PM   #4
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hmm, its possible that someone installed an aftermarket replacement blower motor, and wired it backwards. some replacement parts require splicing in the connector, if its wired backwards it will spin backwards and move very little air. look at the connector and see if there's any splices by the blower motor.
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Old 05-09-2010, 09:50 PM   #5
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Remember, I'm a newbie, that goes for mechanics in general. Where exactly am I looking?
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Old 05-09-2010, 10:07 PM   #6
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i'd suggest getting a good service manual, and the blower motor is under the dash on the right side. you can also post pics and we will answer and help that way to.
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Old 05-09-2010, 10:40 PM   #7
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I've got a Haynes, but that doesn't help much. Do you mean one from Jeep? I'm just not sure what to look for, everything under there looks factory.
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Old 05-09-2010, 11:23 PM   #8
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If setting 4 is out on the turn control well.....it's not the resistor. Setting 4 does NOT go through the blower reostate "resistoer". It pulls straight 12v power...thats the problem..jeep had a brain fart there.

And yep, VERY common issue. Saidly the fix is some relays and a new control box if the melting is too bad. Yep I said melting.

Pull the heater/ac control panel out and look at the back of it where the wire connector is connected on the far right side. It will have 3 wires. One which is a little larger and green. Check for melting. Look close. Also at the other connectors for any melting.

"""""to remove heater control box for inspection""""

Remove the defrost vent cover , pull up on the far side not the middle. pops right off.
Remove the ashtray. Open it and push down on the tab on the inside and slide out.
Remove the screw behind the ashtray.
At the top of the center bezel where you removed the defrost vent cover,,,remove the 2 screws that hold on the bezel. Pull the whole center bezel off..pull right off.
The heater/ac controls will have a few screws holding it on...take them off.
Poof your done. and can inspect the controls.

READ through this WHOLE thread. And the links in post #10.
CLICK ME---->>>>http://www.wranglerforum.com/f5/heat...rol-16174.html

If you have any more questions let us know.
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Old 05-10-2010, 01:21 AM   #9
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Got my job for tomorrow, I'll let you know. Thanks
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Old 05-10-2010, 01:24 AM   #10
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No problem bud. The problem is common. The melting could be easy to see or you may have to look hard.

If you need any more help let us know bud.
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Old 05-10-2010, 09:24 PM   #11
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Didn't need to look hard at all. The control switch is toast and so is the plug. I assume i need to buy both? I checked out the link on that resistor, I assume your telling me to do that too?
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Old 05-10-2010, 09:31 PM   #12
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Originally Posted by legman68 View Post
Didn't need to look hard at all. The control switch is toast and so is the plug. I assume i need to buy both? I checked out the link on that resistor, I assume your telling me to do that too?
Ha, yep it's common. Yep you will need to do "that",,,adding the relays to limit the power going to the switch to prevent it from melting in the future. If not...well it's going to melt again.

You can pick the relays up at any auto parts store. As for the wire and connectors.

For the "PLUG'....good luck jeep will only sell you a complete harness. Remedy for it is to use male spade connectors with the protectors on them.

For the control box you will either have to go through the dealership for the control box. Daveysjeeps.com can sell you a used one but the price they want for them you would be better off with a new from the dealer.
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Old 05-10-2010, 09:39 PM   #13
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Do I need the whole control box, or just the blower switch? Found that for $15 new. Will the parts place know what kind of relays I need? Any specs I need to give them. Very cool to get help like this!
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Old 05-10-2010, 09:55 PM   #14
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30 amp relay.
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Old 05-10-2010, 10:11 PM   #15
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Thanks Again!
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Old 05-11-2010, 02:16 AM   #16
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I have read different things on this melting, is this common? My 2002 has never had an issue with this, and last time I looked the plug was fine. I did change the resistor out last year but after 8 years of no trouble I am not going to complain!!
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Old 05-11-2010, 02:20 AM   #17
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I have read different things on this melting, is this common? My 2002 has never had an issue with this, and last time I looked the plug was fine. I did change the resistor out last year but after 8 years of no trouble I am not going to complain!!
Common...Yes mainly for the older TJ's.
The blower resistor is most common. For all TJ models. Exspecially the newer model TJ's.
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Old 05-11-2010, 10:00 PM   #18
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Ok dis, changed the switch, and only high works. Which i get means the switch is actually not doing anything, straight thru from battery. But at least it's doing something. From that past thread, could it be the resistor down by the blower?
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Old 05-11-2010, 10:11 PM   #19
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^^^ Yes. $18 from the dealer. Don't get one from the chain auto store like autozone...they have been having issues with crappy blower resistors and other electric parts lately.
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Old 05-11-2010, 10:13 PM   #20
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Quote:
Originally Posted by legman68 View Post
Ok dis, changed the switch, and only high works. Which i get means the switch is actually not doing anything, straight thru from battery. But at least it's doing something. From that past thread, could it be the resistor down by the blower?
Did you fix the melting issue??? IE, replace connector/wire relays? If you don't it will melt it again.
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Old 05-11-2010, 10:14 PM   #21
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OK got tomorrows job!
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Old 05-11-2010, 10:16 PM   #22
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I must admit I did not. I stopped at local parts store and there was a mile long line. I will though! Might as well do it tomorrow.
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Old 05-11-2010, 10:19 PM   #23
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good luck bud let us know if you have any issues.
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Old 05-12-2010, 10:39 AM   #24
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18? Holy crap, 74 from dealer! Autozone for 41!
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Old 05-12-2010, 12:43 PM   #25
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Right thing?

Guy at parts store had no idea what i was explaining to him.So this is what i ended up with. If it's right, do they go on all the leads that go into that switch?
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Old 05-12-2010, 12:51 PM   #26
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Oops!

Wow! Thats a big picture
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Old 05-12-2010, 01:19 PM   #27
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Quote:
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Guy at parts store had no idea what i was explaining to him.So this is what i ended up with. If it's right, do they go on all the leads that go into that switch?
Um,. nope.. that is a fuse link. It's so you can add a fuse into a wire line. Not a relay.

Here is what you are looking for. Most auto stores will have them buy the light bulbs or beside their fog lights.....

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Old 05-12-2010, 01:24 PM   #28
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Quote:
Originally Posted by legman68 View Post
18? Holy crap, 74 from dealer! Autozone for 41!
WOW, they went up in the last year or two!! I just looked.

Here you go for $35....

BWD RU1046 - Blower Motor Resistor | O'Reilly Auto Parts
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Old 05-12-2010, 04:34 PM   #29
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Uhhh...I really am a smart guy, but feeling pretty ignorant about now. The article stated they put one on each speed. How does that work? I got 5 wires going into the switch, each one is a speed, with one common? How do the relays tie in?
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Old 05-12-2010, 08:46 PM   #30
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Just when I thought I was done. Get home, put in the resistor, same thing, only high speed. Plus another guy at parts store was useless about the relays. I guess I'll find those online.

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