Laredo overheating - please help - JeepForum.com
 
LinkBack Thread Tools
post #1 of 8 Old 03-23-2013, 07:04 PM Thread Starter
suey3b
Registered User
2001  
 
Join Date: Feb 2013
Posts: 9
Laredo overheating - please help

My son has a 2001 Jeep GC Laredo. It started to overhear about a month ago, and we've changed out the thermostat, relay and burned out radiator fan motor, along with the fuse. Nothing has worked. Today we checked that the relay and fan were pulling the correct amperage and were grounded - everything checked out ok. My father in law says it might be the PCM. Which is going to su*k if we have to replace that. How can I check to see if the PCM is bad? Thank you!!

suey3b is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 03-23-2013, 07:09 PM
RTLee
Registered User
1995 ZJ 
 
Join Date: Feb 2012
Location: St. Joseph
Posts: 17
Is the fan not turning on?

Is the cooling system free of leaks? Can you feel heat from both upper and lower rad hoses? Has it previously overheated badly? (if so you may have to block test it for combustion gasses in the cooling system, if this is positive, you have a blown head gasket.)

More info, please!
RTLee is offline  
post #3 of 8 Old 03-23-2013, 07:17 PM Thread Starter
suey3b
Registered User
2001  
 
Join Date: Feb 2013
Posts: 9
The fan is not turning on at all, but does when you jump it right from the battery. Checked the amps that it's pulling and it seems to be fine. Relay clicks on and off. Fan does not turn on. It has overheated to the point where it was boiling. As long as he's moving, it's ok. But when it's idling, it overheats.
suey3b is offline  
post #4 of 8 Old 03-23-2013, 07:18 PM Thread Starter
suey3b
Registered User
2001  
 
Join Date: Feb 2013
Posts: 9
No leaks in cooling system and it has heat in both hoses.
suey3b is offline  
post #5 of 8 Old 03-23-2013, 07:25 PM
RTLee
Registered User
1995 ZJ 
 
Join Date: Feb 2012
Location: St. Joseph
Posts: 17
Was the relay behind the headlight changed as well?

You can check the PCM by activating the fan through a scan tool.
RTLee is offline  
post #6 of 8 Old 03-23-2013, 07:44 PM Thread Starter
suey3b
Registered User
2001  
 
Join Date: Feb 2013
Posts: 9
Yes, we changed the relay behind the headlight. Someone had apparently done so in the past, as there was already an access hole cut in the plastic.
suey3b is offline  
post #7 of 8 Old 03-23-2013, 07:48 PM
RTLee
Registered User
1995 ZJ 
 
Join Date: Feb 2012
Location: St. Joseph
Posts: 17
It doesn't make sense. At all. The relay is putting out the correct amperage yet isn't turning on? Wiring? Are you actually getting voltage and amperage at the plug ON THE FAN? If so it should turn on...

Real head scratcher here...might be worth getting a shop involved. It's worth it to stop throwing money at the issue.
RTLee is offline  
post #8 of 8 Old 03-23-2013, 08:00 PM Thread Starter
suey3b
Registered User
2001  
 
Join Date: Feb 2013
Posts: 9
We checked to see how much amperage the fan was pulling, but now that you mention it, I'm not sure we checked the wires from the relay to the fan connector. I really appreciate the comments and suggestions. I think we're probably going to take it to the shop this week. Thank you.
suey3b is offline  
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.



Email Address:
OR

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.




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