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Old 08-26-2006, 02:15 PM   #1
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AC only works on level 3.

Yes, I have researched this for the last 6 weeks. When I bought my TJ it worked fine. Signed the paperwork, picked my wife up and the air started only working on the setting next to high.

I thought it might be the blower resistor that I had read about but why would it work only in 3? I changed it this morning and it didnt change a thing (except a bad back).

The guy at the stealership said if that didnt work it must be the switch. I find it odd that 1, 2 and 4 would go out in this scenario.

Any suggestions? Thanks in advance.

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Old 08-26-2006, 03:14 PM   #2
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It might be a control head or the relay. What year is it Some don't have a relay in the curcuit. I can look up the schematic and see whats in the lines on your TJ.

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Old 08-26-2006, 03:55 PM   #3
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Its a 2001, thanks for your help.
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Old 08-26-2006, 06:36 PM   #4
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Ok the circuit is as follows Control head to the blower resistors to the blower motor, the blower relay is behind the blower motor and its only function on this system it turning on or off power to the motor when hit with a small voltage if this was out your motor shouldnt work at all. Since The system only operates on level 3 and you replaced the resistors as far as the schematic shows the only things in common with those 3 is the control head in the dash, the plug that connects to the rear of the control head and connector C205, The connector number c205 you see on the schematic is suppose to be behind the left kick panel and is light green.

Heres a copy of the schematic for you to see what I am talking about
.
Hope it helps


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Old 08-26-2006, 07:58 PM   #5
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Man, you are awesome. I went out to the TJ, removed the glove box, reached back and wiggled the connector and the other speeds started working.

The down side is its very touchy. Now I have to ask, is it the plug or the control unit. I have it working on High right now and in Texas that is the only setting I need.

Thanks so much for your time. This forum rocks.
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Old 08-26-2006, 08:27 PM   #6
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Its the plug more then likely, The connections are probably corroded or oxidized. Worn plugs are rare unless they were brutalized by a mech working under the dash. I would clean the connector pins and the matching pins on the head. Use an electrical component cleaner check over the plug and see if the plastic is damaged in any way. To clean the plug I would use an old toothbrush then blow it dry after finished If needed you can also expand the pins in the plug to make the connection better. The best way to do this is take the beauty cover off the front and remove the head Then you will have full access to the whole system.
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Old 08-26-2006, 09:30 PM   #7
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I will do that in the morning, thanks again.
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Old 08-27-2006, 04:42 AM   #8
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Your welcome, anytime
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Old 11-14-2006, 10:30 AM   #9
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I've got a 2002 with almost the same problem. The fan will not blow on the two low settings.

Is this schematic basically the same for the 2002?
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Old 11-14-2006, 10:33 AM   #10
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ya probably so. i read a mag with the common problems for wranglers and they said this was one and that it is most likely the switch goin out when it only blows on the highest setting
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Old 11-14-2006, 07:48 PM   #11
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This is a pretty basic blower schematic so yes it should be the same for an 02. If level 1 and 2 are not working, the most common problem is the blower relays/connections to the relays. Bigjeep also has a great point, the switch in the head and the connection to the head are also possibilities. If you have an ohm/volt check the voltage going into the relays and out of the relays to see if they is output ans input, they narrow it down from there.

hope it helps
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Old 11-15-2006, 09:41 AM   #12
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Thanks guys.
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Old 11-28-2006, 07:06 PM   #13
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I've lost all of the fan from 1 to 4, nothing works, I think the blower is completely out. I have a 97 Wrangler, any suggestions?

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