(TEXAS)Help With My AC (Blower Motor Controller) - JeepForum.com
LinkBack Thread Tools
post #1 of 3 Old 06-17-2005, 04:57 PM Thread Starter
Registered User
Join Date: Mar 2005
Posts: 970
(TEXAS)Help With My AC (Blower Motor Controller)

Well I've talked about this before but things finally got really bad.

I first bought my Jeep about four months or so ago within the first week my AC (99 Grand Cherokee Limited With Automatic Control Zone) momentarily went out when I drove by another Jeep Grand Cherokee, it was like it went from 100% then dipped to 20% then came right back up, this all happened within a second.

A few months later I was driving and hit a slight curve and when I came out of the curve I got no air from the AC, I pulled over about thirty seconds later with the intention of stopping and turning the engine off and restarting to see if it would come back on, well as soon as I stopped it came right back on.

Yesterday things were working perfectly and today when I got into the Jeep no air would blow.

Here is what I know:

Everything lights up.

I get no air from anywhere, in any mode including defrost.

I can hear the compressor click and come on, my RPM's go up slightly.

The part near the firewall on the passenger side in the engine compartment gets cold, as does the plastic part near where the passengers legs are.

If I turn off recirculation some cool air will come through the system.

My conclusion is the blower motor controller so my questions are:

Does anyone agree?

Anyway to check it, clean it, or anything like that?

Is it difficult to replace myself and if so where is it located?

I did find this diagram but I wasn't sure what the location was:



2002 Jeep Grand Cherokee Limited 4.7L H.O. V8
Briandl is offline  
Sponsored Links
post #2 of 3 Old 06-17-2005, 06:06 PM
Registered User
2000 WJ 
Join Date: May 2005
Posts: 59
I have had the same problem with my 2000 GC.

The blower controller is a small black box underneath the glove compartment. It comes off easily with a philips screwdriver. . On mine, one of the connectors had overheated and melted. Arcing had caused a buildup of soot / carbon which eventually caused the blower to stop working. I was able to track down the problem just by wiggling the wiring harness going into this box - that would make my blower motor start going again.

Lots of people have this problem - the connectors Jeep uses are probably undersized or too loose causing arcing and overheating.

To fix this I took the wiring harness off, and used fine sandpaper to clean the carbon off of the contacts and I squeezed the female connector with a pliers to make a tighter connection. I then applied conductive grease and voila it's been fixed for a year now.

You could also replace the blower controller and the wiring harness, or you could solder things together to ensure you don't get arcing again.
ddruker is offline  
post #3 of 3 Old 06-17-2005, 06:22 PM Thread Starter
Registered User
Join Date: Mar 2005
Posts: 970
Thanks for the input.

Once I found where it was I gave it two solid raps with my knuckles and started it up, came on just fine.

I'm thinking I'll take a good look at it and see if anything obvious is wrong, if not I may go ahead and replace it, if something is obvious like the buildup you mentioned I'll try cleaning it first.

I might also try the junkyard before the dealer since the part is 111.00

2002 Jeep Grand Cherokee Limited 4.7L H.O. V8
Briandl is offline  

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
blower motor - blower motor connector melted BradMB2004 ZJ Grand Cherokee Forum 9 10-14-2014 08:57 AM
No pwr to blower motor slowride99 ZJ Grand Cherokee Forum 3 11-08-2009 07:49 AM
Wired up blower motor power module - do I need to replace blower motor? sniperdude ZJ Grand Cherokee Forum 0 04-19-2009 02:33 PM
HELP! Blower Motor, Blower Motor Resistor Fix Already Attempted... No Luck! DJGWJ ZJ Grand Cherokee Forum 3 12-26-2008 12:51 PM
94 JGC, where is the blower motor relay, and where's the blower motor ground wire go? camosilver ZJ Grand Cherokee Forum 1 08-24-2006 10:15 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome