Question about Jeep Wrangler

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I'm looking for a diagram showing where I can fint the Heat/AC blower motor resistor so I can replace it.

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  • johnbaker48 Sep 26, 2008

    2002 Wrangler Sahara 4.0 liter

  • yadayada
    yadayada May 11, 2010

    What year is the Jeep?

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The blower motor resistor on a 2002 Wrangler is behind the glove box, on the passenger side

Posted on Sep 26, 2008

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The high speed relay bypasses the resistor. So you should have power coming from the fuse and thru the high relay. Then the resistor for the other speeds gets power from the heat and ac control module which also controls the blend doors.
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The most common problem would be a bad blower at which you can test for power at the motor connector with a testlight, the other most common problem is the resisitor ,theres one for the front blower and one for the rear blower, you may have a bad resisitor for the rear blower this resistor is located next to blower.theres also arelay in the fuse/relay box next to the battery under the hood,the best thing is to start testing for ower at the switch and work your way to resistor, i think you will find a bad resistor to rear blower motor.heres a complete wiring diagram of the whole front and rear heat and ac unit, everything is labeled good luck.johnjohn2_51.gif

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If you did not get an owners manual with your truck ( purchased used ), you can download one from Ford :
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

The AC clutch solenoid is not in the fuse panel, not sure what relay is AC. There is a Blower motor relay, but this is only if the blower motor does not work in AC, vent or heat.
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There is also the Blower motor resistor, but this is usually the blower only works on high, the other speeds are not functioning
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Looking up under the glove box
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The Blower Motor Resistor is located on the passenger side firewall, not far from your A/C's H-Valve (or expansion valve), going inside of the vehicle. The blower motor resistor has a 4 or 5 way black connector plugged into it and this is the only visible portion of the Resistor you will see. Remove the wiring connector and remove the 2 or 3 screws with an 8 mm or 5/16" socket (8 mm and 5/16" are the same). Once the screws or fasteners are removed, just pull the blower motor resistor out of the firewall and if you look at it, it will have various coils of wire on it, sometimes it will show burnt coils, but you can always check the various coils with an Ohm-meter.

Aside from that, install the new Blower Motor Resistor and Voilà! Your inside Blower Motor should work just fine.

A brief note here, if your fan doesn't work when the fan switch is on High, then it's not the Blower Motor Resistor, but possibly the Blower Motor itself. Should this occur, please get back to me insofar as how to replace the blower motor and why the blower motor's wires have to be twisted...even with the new blower motor fan.

Best of Luck,

"00 Buck"

"Still living on the Right Side of Dirt..."

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If you look under the hood there is a big black box on the passengers side of the car with the two ac lines going to it, the box is on the firewall there is a little black square shaped piece on it with a few wires going to it this is th resistor take the two screws out and replace

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Your blower speed resistor has gone bad and needs to be replaced. You can pick one up at Auto Zone or Parts Source with the step by step instructions to getting the resistor replaced with common tools.

It is located under the glove box, way in the back of the passenger foot area. You'll need to remove 2 screws with a 7mm socket, and remove the plastic cover that covers the blower motor and another component box that I think controls the passenger airbag. After removing the plastic cover you'll need to side that passenger airbag module to the right so it pop off its mounting bracket and move it out of the way. That will give a better view of the blower motor. I highly recommend you also remove the blower motor itself because the Blower Motor Resistor is located behind it. I think you'll need a 5mm or 5.5mm socket to remove the 3 screws that hold in place the blower motor and 2 more screws for the Blower Motor Resistor... It's a cramped location to work in but if you have all the tools and enough lighting then it shouldn't take more than 30-60 minutes to do. The Blower Motor Resistor costs about $19-$25. Good luck

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I have the same truck. Mine only worked on high. I replaced the blower motor resistor and it worked for a few seconds and then the resistor started to overheat and fry. I then removed the blower motor and found it to be pretty seized up so I replaced it along with another resistor and it works great. At any rate, be careful not to ruin a new resistor. If it shows any signs of getting hot when you first fire it up then turn off the blower motor immediately and replace it too. In my case, the worn out blower motor is probably what caused the original resistor and the replacement to fail in the first place.

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Remove the insturment panel cover right behind the radio, remove the switch assembly look on the back right hand side there is a black plug connection (5 or 6 prong flat). this plug is and will always be a problem with jeeps. somtimes when a raido has been put in, the plug can be pushed away and there you go no heat, no fan. it could also be vibration from going down a rough trail.

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