Heater, AC blower motor does not work on high? - JeepForum.com

LinkBack Thread Tools
post #1 of 3 Old 05-22-2016, 05:31 PM Thread Starter
Registered User
Join Date: Sep 2015
Location: Utopia
Posts: 16
Heater, AC blower motor does not work on high?

1996 Jeep Grand Cherokee 4.0.
The heater motor no longer works on the highest setting. I put a volt meter on the connector, reading left to right and top down, #1 had NEGATIVE .30 volts, #2 had 13 volts, #3 had 1 volt, #4 and #5 had 13 volts. The two wires that exhibited less than 12 volts were dark green and black/brown.

Any idea if this indicates a broken wire or could the switch need replacing?

Dean06919 is offline  
Sponsored Links
post #2 of 3 Old 05-22-2016, 05:59 PM Thread Starter
Registered User
Join Date: Sep 2015
Location: Utopia
Posts: 16
Update: I wiggled the wires by the blower motor, and it started to work. There's a lot of wires and connectors down there, any idea what one may be the problem?
Dean06919 is offline  
post #3 of 3 Old 05-23-2016, 03:33 PM
Hears the voices
kg6mov's Avatar
1996 ZJ 
Join Date: Nov 2012
Location: Cupertino
Posts: 11,520
Do you have auto climate or normal?

In the auto climate system there is a relay that controls high speed with the blower motor controller controlling the other speeds.

1996 ZJ Green Laredo V8, 2.5" OME and Bilsteins, 33's, Holes drilled in the roof.
1998 ZJ 5.9 - Junked
1984 F250, 460 BB, T19, work truck/future tow pig
1987 Mercedes 300D Turbo, the diesel daily, 30mpg in style

Originally Posted by Texas ZJ1 View Post
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
kg6mov 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

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