Heating trouble shooting. - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > General Technical Discussions > General Jeep & Off-Road Equipment > Heating trouble shooting.

Alloy USA Still AvailableAdvance Adapters SYE KitsOconee Off-Road Free Shipping Lifts Tires Bumpers Tops and

Reply
Unread 10-23-2013, 12:49 AM   #1
jeepster02
Registered User
1994 YJ Wrangler 
 
Join Date: Jul 2010
Location: Farmington, MO
Posts: 22
Heating trouble shooting.

Basically, I feel heat barely coming from my defrost vent, but its obviously not blowing. The fan speed control does nothing, no noise, blowing, just nothing. My guess is blower motor, but if anything, what else could cause this? It is in a 94 YJ. Thanks.

jeepster02 is offline   Reply With Quote Quick reply to this message
Unread 10-23-2013, 12:53 AM   #2
uberxj92
Registered User
1992 XJ Cherokee 
 
Join Date: Oct 2012
Location: umatilla, florida
Posts: 1,962
Check the relay for the a/c and blower. Check the fuses. I dint know where the blower us in s yj but you could pull the plug check for power.
If you have good relay and fuses and no power I would suspect the control panel .
__________________
http://www.jeepforum.com/forum/f177/92-xj-sadness-2075657/index2.html
uberxj92 is offline   Reply With Quote Quick reply to this message
Unread 10-28-2013, 09:07 PM   #3
jokerchief462
Wild Wheeler
 
jokerchief462's Avatar
1989 YJ Wrangler 
 
Join Date: Nov 2010
Location: Sin City, Nevada
Posts: 2,860
Check the plug on the firewall below the batter tray single red w/white tracer. That is the blower motor hot wire it has a case ground.

The heater control panel I think 4 screws. Pull it away from the dash slowly. The lever that turns power on to the system uses two white wires check for voltage at both sides and then move the lever make sure power goes through. If you have power there on both sides go over to the passenger side and look at the heater vents you should find a plug going to the resistor that gives you the three speeds. Check for voltage there with a meter.

Here is apic of the blower motor wire and plug
heater-motor-wire.jpg

__________________
89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.

AF Jeep Club Tail #184
jokerchief462 is offline   Reply With Quote Quick reply to this message
Unread 11-08-2013, 05:12 PM   #4
jeepster02
Registered User
1994 YJ Wrangler 
 
Join Date: Jul 2010
Location: Farmington, MO
Posts: 22
Great, thanks fellas. Ill have to check it out this weekend. Hopefully its an easy fix. I dont really want to dig the blower motor out to swap it.
jeepster02 is offline   Reply With Quote Quick reply to this message
Unread 11-11-2013, 06:48 PM   #5
jeepster02
Registered User
1994 YJ Wrangler 
 
Join Date: Jul 2010
Location: Farmington, MO
Posts: 22
Well, we found that there must be a short somewhere. So, for now, we basically bypassed and I have heat. This is just temperary until I have the time to tear into thw dash to find the short. Thank fellas
jeepster02 is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

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.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.