AC blower motor switch burn out

jp issue from october has a fix for this problem, so is there any further info cause a picture of the actual wiring isn't helping much.  all the wires are white or yellow but all look the same color, which wires go where?  anybody got a clue.  spent 3 weeks gathering all parts for this and now it is not working in the jeep.  hook it all up and i get a screeching door buzzer noise from the relays.  HELP!!!  

make sure you have the relays wired correctly. each speed will need it's own relay. the relays can all use the same power source and ground, but the speed selector will be the circuit switch for each relay, they can be confusing just take you time, calm down and you'll figure it out.  
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thanks alot.  I'll let you know how this goes.  all you guys out there, pay attention. you may need this posting some day as jeep is not planning on fixing this problem anytime soon and this could cause a dash fire.  

already did it on mine, it was easy.  
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Okay, now I have blower issues. I have been reading the threads, and checking + re-checking the jpmagazine article to confirm how to wire in the relays. But I'm not much of an electiral wizzard(barely can operate a computer) so can someone tell me how to wire in the relays.

What I understand so far, according to the article :
1) Cut 4 wires coming from blower motor/resister unit (Did that)
2) Attach blower switch to "SWITCH" spade on relay (DiD that)
3) Attach other end of wire coming from blower motor/resister to "GROUND" spade on relay. (Did that)

4) What next???? Do I need to run power to each relay? If so, where is a recommended source to tap into?

5) Can I run the power source through each relay? From one to another to another (like in series)

Hopefully after I figure out the blower switch issue, I will figure out how to make a power point on it and publish it on the internet!  

Okay, now I have blower issues. I have been reading the threads, and checking + re-checking the jpmagazine article to confirm how to wire in the relays. But I'm not much of an electiral wizzard(barely can operate a computer) so can someone tell me how to wire in the relays.

What I understand so far, according to the article :
1) Cut 4 wires coming from blower motor/resister unit (Did that)
2) Attach blower switch to "SWITCH" spade on relay (DiD that)
3) Attach other end of wire coming from blower motor/resister to "GROUND" spade on relay. (Did that)

4) What next???? Do I need to run power to each relay? If so, where is a recommended source to tap into?

5) Can I run the power source through each relay? From one to another to another (like in series)

Hopefully after I figure out the blower switch issue, I will figure out how to make a power point on it and publish it on the internet!  

A relay is just a switch that is controlled electronically. They are used to supply high current without the current going through a switch. That is what you're trying to accomplish. High current to the fan that does not pass through the dash switch.

Then, your dash switch controls the relay and not the fan. All relays are different. But, they function the same way. Some relays have more, but there are four main terminals that need to be hooked up. Your relays should have a schematic. They should be Automotive single pole/single throw relays.

Tell me what relay you have, and I'll tell you the positions to hook up.  

I went to radio shack and got (4) 30 amp auto relays. There are four spades (poles) "ON/OFF"-#86, "GROUND" -#86, "12v/out"-# 30/51, and "12v/in" - # 87. No other specific manufacture markings on the relay.

Thanks for your timely response!!!  

Relay terminal #85 - 12v from Accessory On (new 16 gauge wire)

Relay terminal #86 - low speed cut wire (from fan switch)

Relay terminal #87 - low speed cut wire (to resistor block)

Relay terminal #30 - ground (new 12 gauge wire)  

Can I buy you a BEER! It worked! Thanks a bunch, now let me see if I can do this 4 times (4 relays)  

Anybody able to answer some questions on this repair.  I've been using this article

http://www.jpmagazine.com/techarticles/electrical/154_0710_jeep_fire_prevention/index.html

and this post as a guide but am coming up short.

I've got my jeep ready and the relays (30amp) are labeled
85 to 86 closed circuit
87 to 30 open switch.

I've run a ground up to the dash mounting bolt (above/to right/forward of radio and coin tray.  I believe this is a good ground...it tested ok.

I do not have the original connecter to the blower motor switch...it melted.  So I'll be using a 6 inch wire to run the other side of what would originally be the cut wires to the switch.

At the moment where I'm stuck is that I have 3 wires (the ground I created and the two sides of the cut wire.  What exactly is the 4th wire and where do I get it from?

Using the numbers where do I place these wires on the relay?

85 to 86 closed circuit
87 to 30 open switch.

Thanks for any assistance.  

Terminals 85 and 86 go to the coil of the relay. The coil opens and closes the connection between 30 and 87.

The fan speed circuit that you're working with is a negative or ground circuit. The fan speed selector switch supplies the ground to the fan motor. Each of the four wires goes to the resistor block and the resistor block controls the fan speed because of the resistance.

So, use the newly created ground and connect it to terminal 30 and then the 12ga hi speed cut wire coming from the resistor block should be connected to terminal 87 on the relay.

Then, connect a new accessory-on 12v wire to terminal 85. This supplies voltage to the relay coil. Then, connect the 12ga hi speed cut wire from the fan speed control switch to terminal 86. This supplies the ground to the relay coil.

Now your fan speed switch will control the relay coil, switching the relay coil on or off. When the relay coil is activated, the circuit between 87 and 30 will be closed and the fan will run. When the relay coil is deactivated, the fan will stop.

Repeat the process for all four relays, one relay for each fan speed wire.
The new 12v wire can be daisy-chained between each relay's terminal #85 so that you only need 1 new 12v wire.
The new ground wire should be spliced (1 into 4) and run to each relay's terminal #30 separately.

The 18 gauge wire is lo, 16 gauge is med1, 14 gauge wire is med2, and 12 gauge wire is hi.  

This is a great DIY article: (http://www.jpmagazine.com/techarticles/electrical/154_0710_jeep_fire_prevention/photo_04.html)

HOWEVER AND I DO MEAN HOWEVER! It is missing more details and pictures.  If any of you guys can assist me in understanding the wiring schematic I will gladly take pictures and post a new followup article so all the other Jeep Wrangler owners out there can get this issue resolved as well.  I haven't been able to run my A/C or heat in a year and a half now--IT SUCKS!!!  I live in the South and humidity is horrible in August!  After having replaced the fan switch only for it to burn out again in 2 minutes, this is my last hope!!   PLEASE HELP AND I WILL DOCUMENT MY JOB AND POST A NEW, MORE DETAILED/MORE HELPFUL DIY!!!!!!

I've read and reread that article but the 4 relays kinda stump me on some parts.  The thing I don't understand is if each 30 Amp relay has 4 terminals to plug into, and there is only 1 fan switch, where do I get all the other wire ends for each of the remaining 3 relays??  Maybe I'm looking at it wrong but it would seem that I will need 16 wire ends for the 4 relays with 4 terminals on each.  The fan switch, as I recall, only has five terminals/wires on the back of it.  

I have purchased the following:
1.) new fan switch - $28 at local Jeep dealership.
2.) Four 30-Amp Relays - $6 each at Radio Shack

Thank you if you can help me, I am stumped!  

Are you kidding? Did you read the post right above the one you just posted.

Click Here for another thread that has a schematic. There's a lot of additional information in these two threads that suppliment the article. Study it, I think you'll find everything you need to know. It's really very simple. When you get done you'll laugh at how simple it is.  

Yeah, I'm not an electrical wiz by any means, but thank you for the other thread link....after reading that one, I seem to understand it alot better now and am ready to start.  One last question though,.....when I run the Daisy chain for the two new wires, I am going to use a fuse tap for the 12v fromt he fuse box (got that), but where should I run the other wire for the Ground.  Where's a good place to ground it?

Thanks so much.  Sorry I had a hard time with the first article.