AC problem - JKowners.com : Jeep Wrangler JK Forum
 
LinkBack Thread Tools Display Modes
post #1 of 8 Old 08-20-2010, 11:39 AM Thread Starter
Granite Guru
 
wastedyouth02's Avatar
 
Join Date: Dec 2008
Location: Afghanistan,San Diego, Prescott
Age: 30
Posts: 166
Feedback: 0 reviews
Send a message via AIM to wastedyouth02
AC problem

SO on my way to vegas for last years SEMA my AC magically cut out and hasnt worked since, i figure its about time i get around to fixing it. The AC light on the switch panel comes on when you press the button but the clutch does not engage. As far as i can tell no fuse is blown (ive used a meter to check them) and the system is fully charged. At the connector right before the wires go down to the clutch im getting 13volts, what should be next to check.
wastedyouth02 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 08-26-2010, 07:28 AM
Rock God
 
ronjenx's Avatar
 
Join Date: Aug 2010
Location: Maine
Posts: 1,874
Feedback: 0 reviews

Did you check if any codes were set?

Here is a list of possible causes.
Since you are getting power to the harness for the clutch, #3 looks most likely.


1. No refrigerant in the refrigerant system.

2. Open fuse.
Check the fuse in the junction block. Repair the shorted circuit or component and replace the fuse as required.

3. Inoperative A/C compressor clutch field coil.
A/C Clutch Coil Resistance
4.2 ± 0.2 ohms
When measured across coil lead connector @ 25° C (77° F)


4. Improperly installed or inoperative A/C pressure transducer.

5. Improperly installed or inoperative Evaporator Temperature Sensor.

6. Inoperative A/C-heater control, totally integrated power module (TIPM) or PCM/ECM.

Last edited by ronjenx; 08-26-2010 at 07:35 AM.
ronjenx is offline  
post #3 of 8 Old 08-26-2010, 09:31 AM
JKO Addict!
 
Goodysgotacuda's Avatar
 
Join Date: May 2009
Location: Denton, TX
Posts: 13,230
Feedback: 1 reviews

Do you have refrigerant?

SOLD - '09 2dr Rubicon - 1.0Gal | 6spd | 37s | 4.88s |
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
| OR-Fab cage | Poly Cage | BFH Front | XRC Rear | XRC12 Winch | Walker Evans Beadlocks |

Retired from the Jeep community, for now.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Goodysgotacuda is offline  
Sponsored Links
Advertisement
 
post #4 of 8 Old 08-29-2010, 07:46 PM Thread Starter
Granite Guru
 
wastedyouth02's Avatar
 
Join Date: Dec 2008
Location: Afghanistan,San Diego, Prescott
Age: 30
Posts: 166
Feedback: 0 reviews
Send a message via AIM to wastedyouth02

I have tried re-charging the system to no avail.
By junction block your refering the the one between the airbox and battery correct? or is there another one im missing
im getting 4.4 ohms across the coil

Today as im playing with it again, i am no longer geting power to the clutch harness. Im printing out the diagrams now to go back out and see wtf is goin on. Are these systems conrolled on the ground side as in the ecm grounds the circuit to turn it on?
wastedyouth02 is offline  
post #5 of 8 Old 08-29-2010, 10:17 PM Thread Starter
Granite Guru
 
wastedyouth02's Avatar
 
Join Date: Dec 2008
Location: Afghanistan,San Diego, Prescott
Age: 30
Posts: 166
Feedback: 0 reviews
Send a message via AIM to wastedyouth02

So i definitely do not have voltage to the clutch, manually applying power the clutch does engage and the ac blows nice and cold with in about 5 seconds. Im going to check the transducer for signal voltage tomorrow which should tell me a lot.
wastedyouth02 is offline  
post #6 of 8 Old 08-31-2010, 03:19 PM Thread Starter
Granite Guru
 
wastedyouth02's Avatar
 
Join Date: Dec 2008
Location: Afghanistan,San Diego, Prescott
Age: 30
Posts: 166
Feedback: 0 reviews
Send a message via AIM to wastedyouth02

So i have 5volts going into the transducer but my meter's probes wont fit into the plug to back probe it, Will a scan tool i cna borrow from the vatozone tell me voltages on that. Also does the turn the ignition 3 times thing pull any and all codes available or just P codes?
wastedyouth02 is offline  
post #7 of 8 Old 08-31-2010, 03:43 PM
Rock God
 
Join Date: Jul 2009
Location: Long Island, NY
Age: 35
Posts: 858
Garage
Feedback: 1 reviews

I would be very careful putting power to anything on the JK....

I know a jeep tech that had a JK come in with a bad TIPM because some mechanic put 12v directly to the horn while the factory harness was still connected...

no jeep here...
Racer83l is offline  
post #8 of 8 Old 09-01-2010, 08:55 PM
Rock God
 
bfj aka tambil's Avatar
 
Join Date: Sep 2008
Location: Kissimmee, FL
Age: 50
Posts: 1,185
Feedback: 1 reviews
Send a message via MSN to bfj aka tambil

If you don't have voltage at the clutch..

First check the fuse, then the relay, if no power at the relay then check the control unit. The one you turn the ac on in the cabin. Does the control unit respond to other controls? Like the ac button turns on and off, the vent selector works, etc.

Its obviously electrical and not actually the mechanical ac itself. You can also use a paperclip to jump the low pressure switch to see if that makes the ac engage. BUT that doesn't sound like the problem based on what you have said so far.

Good luck.

Proud to be an American
Shamed of our government

Native Floridian = MUD
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
bfj aka tambil is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JKowners.com : Jeep Wrangler JK Forum 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 email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On

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