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-   -   Blower Resistor Replacement 05 LJ (http://www.jeepforum.com/forum/f9/blower-resistor-replacement-05-lj-1048567/)

Boundless 06-10-2010 05:24 AM

Blower Resistor Replacement 05 LJ
 
Symptom of a faulty blower resistor is, blower only works on speed "4". I got my replacement resistor for $24.99 from Autozone part # JA1476 AutoZone.com | | Blower Motor Resistor | BLOWER MTR RESISTOR

below is just a guide on how to replace the blower resistor, although maybe not the best way, it's the way I did it.

first to remove glove box, slide out the retaining strap on the right side then lower door till you can pull it off the hinge
http://i736.photobucket.com/albums/x...DSC02453-1.jpg
http://i736.photobucket.com/albums/x...DSC02454-1.jpg
http://i736.photobucket.com/albums/x...r/DSC02451.jpg
Next I removed the interior light just under the glove box (1/4"). This made it easier to remove the resistor. You can use this as a work light or just remove the bulb so you don't get burnt.
http://i736.photobucket.com/albums/x...DSC02449-1.jpg
http://i736.photobucket.com/albums/x...r/DSC02444.jpg
Then from above though the glove box opening, I used a 1/4" drive 8MM (5/16) swivel socket with extension and ratchet to remove the top screw (one of two screws holding the resistor), seen just under the brightly colored connector.
http://i736.photobucket.com/albums/x...DSC02447-1.jpg
Then from below I removed the bottom screw using the same 8MM swivel socket set up.
http://i736.photobucket.com/albums/x...DSC02448-1.jpg
With both screws removed I just slid the resistor out of its location then pulled the harness downward (why I removed the light) you can now see why it's faulty (burnt)
http://i736.photobucket.com/albums/x...DSC02438-1.jpg
Now disconnect the resistor plug by first releasing the plug retaining clip, pull the red clip out slightly. (sorry for the blurry pic, camera got fogged up. it was very humid out) first pic shows the red retaining clip in the lock position, the second in the released position
http://i736.photobucket.com/albums/x...DSC02440-1.jpg
http://i736.photobucket.com/albums/x...DSC02439-1.jpg
in the below pic you can see the difference between the new (now plugged in) and the old burnt resistor (in my hand).
http://i736.photobucket.com/albums/x...DSC02443-1.jpg
Here's a pic of the old resistor and the box the new one came in.
http://i736.photobucket.com/albums/x...DSC02456-1.jpg

Well just reverse the above to install and enjoy your lower blower speeds again.

Note: do not use the blower with the resistor removed (not in it's proper place in the blower's air stream) or you can burn it out.

Disclaimer: some of the pictures were taken during reassembly because of the fogged up camera.

timberwolf0122 06-10-2010 08:48 AM

I have got to sit down an build a better PWM fan controller, why do they even use resistors to control the motor?

Knuckelhead 06-10-2010 06:29 PM

Quote:

Originally Posted by timberwolf0122 (Post 9603773)
I have got to sit down an build a better PWM fan controller, why do they even use resistors to control the motor?

So you can have differnt speeds...

explorerlyon 06-18-2010 12:29 AM

I am trying the same repair. I cannot get the wiring harness disconnected from the resistor. I have pulled the red lock out. What nest? Is there a catch somewhere? I have pulled and tugged and connot get the harness disconnected. Help!

EDIT: Got if off finally

Boundless 06-18-2010 08:58 AM

Quote:

Originally Posted by explorerlyon (Post 9645186)
I am trying the same repair. I cannot get the wiring harness disconnected from the resistor. I have pulled the red lock out. What nest? Is there a catch somewhere? I have pulled and tugged and connot get the harness disconnected. Help!

EDIT: Got if off finally

Glad to hear you got it off... :2thumbsup: mine was a little hard to disconnect also . I think the connectors get stuck due to the heat and or condensation.

that's why I found it easiest to pull the resistor out and down with the plug, so I would have more room to hold each part as I separated them.

2004sahara 06-18-2010 09:20 AM

not as easy as some would have you belive......but it is a do it your self job.

explorerlyon 06-18-2010 03:33 PM

I created a thread on how to test if the resistor is bad before replacing it. Here is the link: http://www.jeepforum.com/forum/f9/bl...6/#post9648090

But, after the work of removing the resistor, I would have replaced in regardless with a new one, even if the old one was not bad.

Boundless 06-18-2010 04:34 PM

Quote:

Originally Posted by explorerlyon (Post 9648099)
I created a thread on how to test if the resistor is bad before replacing it. Here is the link: http://www.jeepforum.com/forum/f9/bl...6/#post9648090

But, after the work of removing the resistor, I would have replaced in regardless with a new one, even if the old one was not bad.

nice helpful addition, thanks :cheers2:

Squwearley 09-19-2010 09:41 PM

thanks
 
Thanks for the step by step... made doing this job really easy

Boundless 09-20-2010 05:26 AM

Quote:

Originally Posted by Squwearley (Post 10152143)
Thanks for the step by step... made doing this job really easy

:cheers2: you're welcome. Glad it was helpful

HKB3 09-20-2010 06:02 AM

Any idea if a bad resistor will throw a check engine light?

Neil F. 09-20-2010 06:59 AM

The HVAC blower has nothing to do with OBDII emission system monitoring.

FireMedic777 09-20-2010 11:14 AM

Awesome! Just replaced mine today for about the same price at advanced. Thanks for the good tech thread!

StangsAndJeeps 10-23-2010 08:10 AM

great guide. never knew i could bend that much.

Boston_Wheeler 11-16-2010 08:06 PM

Just did this myself. Thanks for the write-up. Definitely difficult to disconnect the harness. Also, one thing I found to be helpful. I secured the new resistor prior to reconnecting the harness. I had more room and found it much easier this way.


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