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Old 09-02-2012, 05:05 PM   #1
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Need help! HVAC and an idiot

So last summer wasn't blowing on high. Replaced fan speed switch. Then this spring all 4 speeds quit. Now getting around to fix. Put in new blower motor and new resister. Still nothing blowing. Checked all fuses, they're good. When I put in resistor I made sure harness was not melted. Any other suggestions?

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Old 09-02-2012, 05:15 PM   #2
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Did you check that vacuum tube under the hood? Mine fell off once, guess they're prone to that..had to come on here to find that out haha

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Old 09-02-2012, 05:15 PM   #3
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Quote:
Originally Posted by TalkIsJeep
Did you check that vacuum tube under the hood? Mine fell off once, guess they're prone to that..had to come on here to find that out haha
Where is it exactly? What's it look like? (ha remember the idiot part in title. That's me)
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Old 09-02-2012, 05:22 PM   #4
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Quote:
Originally Posted by fan of fanboys

Where is it exactly? What's it look like? (ha remember the idiot part in title. That's me)
This is on the driver's side of the engine..I BELIEVE this is the tube..if it is the problem it'll just be dangling there. Also, check behind the glove box and make sure all the lines are connected..when I bought mine the guy told me the ac was shot..after fiddling around for an hour I noticed one line was disconnected..solved it for me.

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Old 09-02-2012, 05:37 PM   #5
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Thanks for the picture.
I checked. Snug and no cracks. I also followed it to passenger side, like under the battery, and snug with no cracks.
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Old 09-02-2012, 05:44 PM   #6
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So I dunno what else it can be. I guess I'll take to shop next week.
It was working and over the course of few weeks stopped working. Would be blowing and then stop, randomly start back later on. Then after 2-3 weeks of that just stopped.
When I turn control knobs I can hear when compressor turns on and off, depending which setting I am at but blower motor is not spinning regardless of setting.
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Old 09-02-2012, 05:46 PM   #7
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Quote:
Originally Posted by fan of fanboys
Thanks for the picture.
I checked. Snug and no cracks. I also followed it to passenger side, like under the battery, and snug with no cracks.
No problem, sorry I couldn't help more. This is the vacuum line plug behind the glove box I was talking about..mine was a little loose and caused to AC to not blow. Worth a check..good luck!

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Old 09-02-2012, 07:18 PM   #8
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I appreciate your help. Hopefully some one else will chime in with an opinion. I dunno where else to look.
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Old 09-02-2012, 08:02 PM   #9
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You are saying that the blower does not run at any setting? Start by checking at the blower motor connector to see if it has Power & Ground 1 wire should have about battery voltage when blower is on high the other wire should be a ground.
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Old 09-02-2012, 08:56 PM   #10
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Pull the control panel out and check the connector on the back of the mode switch. It's a three pin connector. Unplug it and see if it's melted.
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Old 09-02-2012, 08:57 PM   #11
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You have a 2001, right?

The vacuum lines/hoses have nothing to do with the fan function. They control directing air flow to the various vents. The fan is all electrical. You are probably losing the ground path & most likely it is at the mode switch. Check the 3 wire connector there (next to the vacuum connection). With the connector off from the back of the mode switch make a jumper wire & jump the dark green (center) wire to the black one & with the key on see if the fan runs. If so, check all 4 speeds. If everything works with the jumper, you need a new mode switch. Check this thread, especially post #3. There is also a link to FSMs that will show the wiring circuit.

http://www.wranglerforum.com/f5/blow...ml#post2719754
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Old 09-02-2012, 09:50 PM   #12
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Thanks for responses guys. First thing tomorrow I'm going to check that. I'm going to look at that thread. Will post any follow-up questions and hopefully success.
Just curious, instead of testing those lines would it be easier to just replace that piece? And any idea on cost?
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Old 09-03-2012, 09:10 AM   #13
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@rubi 4 my mrs,

I am up and going to start looking at this today. I assume I need to remove the dash right? And if it was a grounding issue would it have be intermittent at first?
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Old 09-03-2012, 09:52 AM   #14
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So I think I found the wires you're talking about.
I can't view the FSM bc requires flash and can't get on my iPad or iPhone. But I assume this is it.
How do I replace? I have 0 knowledge when it comes to electronics.
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Old 09-03-2012, 10:03 AM   #15
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Yep, thats it. Unplug the 3 pin connector and see if its burnt.
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Old 09-03-2012, 10:06 AM   #16
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I maybe a real idiot. I can't seem to get it unplugged. Here is where I am. Seems like I've unplugged everything but that.
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Old 09-03-2012, 10:07 AM   #17
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When I unplugged that one with 6 wires there was a noise, like braking a seal or something. That normal?
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Old 09-03-2012, 10:08 AM   #18
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Is this melting?
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Old 09-03-2012, 10:15 AM   #19
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Quote:
Originally Posted by fan of fanboys
When I unplugged that one with 6 wires there was a noise, like braking a seal or something. That normal?
That's normal, those are the vacuum lines, no worries.
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Old 09-03-2012, 10:16 AM   #20
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So I am stuck. I can't get those three wires disconnected.
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Old 09-03-2012, 10:25 AM   #21
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did you try jumping those wires?
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Old 09-03-2012, 10:27 AM   #22
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Quote:
Originally Posted by Ebxgsxr
did you try jumping those wires?
I dunno how to do that.
How do I do it? Do I have to unplug first?
The side that's not melted looking moves a bit but the melted side is not budging.
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Old 09-03-2012, 10:35 AM   #23
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No need in jumping it. You need to get a new mode switch and the connector kit to fix the wires/connector. That's your problem. It is fairly common.
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Old 09-03-2012, 10:36 AM   #24
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Quote:
Originally Posted by fan of fanboys View Post
I dunno how to do that.
How do I do it? Do I have to unplug first?
The side that's not melted looking moves a bit but the melted side is not budging.
Quote:
Originally Posted by RUBI 4 MY MRS View Post
With the connector off from the back of the mode switch make a jumper wire & jump the dark green (center) wire to the black one & with the key on see if the fan runs. If so, check all 4 speeds. If everything works with the jumper, you need a new mode switch. Check this thread, especially post #3. There is also a link to FSMs that will show the wiring circuit.

http://www.wranglerforum.com/f5/blow...ml#post2719754

rubi4mymrs posted up directions....that is what he was talking about, right?
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Old 09-03-2012, 10:39 AM   #25
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Originally Posted by gmabry75
No need in jumping it. You need to get a new mode switch and the connector kit to fix the wires/connector. That's your problem. It is fairly common.
Ok so just walk into autozone and say that?
Thanks again for everyone's help. I work on mobile OS and test apps and new phones for a living. Not very good with this kind of stuff. Everything I learn is bc something breaks and I get from here or YouTube ha.
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Old 09-03-2012, 10:39 AM   #26
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That's what he said, but you can look at it and tell it's bad.
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Old 09-03-2012, 10:41 AM   #27
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Quote:
Originally Posted by fan of fanboys

Ok so just walk into autozone and say that?
Thanks again for everyone's help. I work on mobile OS and test apps and new phones for a living. Not very good with this kind of stuff. Everything I learn is bc something breaks and I get from here or YouTube ha.
They prob have the switch, but dunno about the connector kit. The two I've done came from jeep dealer.
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Old 09-03-2012, 10:43 AM   #28
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cool.

fanoffanboys....this forum seems to be the best where people actually help you instead of telling you to figure it out on your own.
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Old 09-03-2012, 11:02 AM   #29
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Advanced did not have. Calling dealership

Dealership parts closed today. Try tomorrow.
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Old 09-03-2012, 11:36 AM   #30
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I went through this same ordeal about two and a half years ago with my previous 2000 SE. My experience was that the mode switch was only sold as part of the control head, and the connector was only sold by the dealer as part of the complete harness. I elected to do neither. After studying the wiring diagram for a bit, I took one of those big yellow butt connectors and spliced the two larger wires together on both ends. This effectively worked as a permanent jumper, keeping the high current of the blower motor (and the heat) out of the switch, while allowing the low current of the A/C request signal (the smaller wire) to still function normally through the switch. In this configuration, the blower fan will not have an "off" position, it will just run at whatever speed the fan switch is set to as long as the ignition is on. Everything else will function normally. I never had another blower issue after doing this.

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