Electrical problems - JeepForum.com

 
LinkBack Thread Tools
post #1 of 12 Old 06-04-2012, 01:30 PM Thread Starter
inkei91
Registered User
2000 XJ Cherokee 
 
Join Date: Jun 2012
Location: Battle Creek
Posts: 12
Electrical problems

I have a 2000 jeep cherokee sport 4wl drive. 4.0 6 inline cylinders.
i have owned this jeep for about 4-5 years and ever since ive had it, it has been teeming with electrical issues. for example: in one weeks time about 2 years ago i replace the idle air control 6 times because it kept going bad. i replaced the battery because the old one was about half the size it needed to be. eventually i replaced the pcm unit located by the air intake with a used one. im currently having many problems with cylinder misfire and emissions codes. i replaced both o2 sensors and it ran fine for about 24 hours then back to same ol same ol.also my a/c clutch and cooling fan only run if i jump the relays. but i will add that they both ran a year ago in the summer just fine. i just went on a long haul(1000 miles) and lost my cruise control, blowers stuck on defrost and no heat. everyone ive asked says bad ground. ive checked all the grounds i can find and they are all good. any suggestions? alternator? another bad pcm? Thanks in advance

inkei91 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 Old 06-04-2012, 05:48 PM
CJ7-Tim
Real Jeeps have dents
 
CJ7-Tim's Avatar
2000 XJ Cherokee 
 
Join Date: Apr 2002
Location: out in the garage - Minneapolis
Posts: 24,780
On a 12 year old vehicle you should expect some additional maintenance compared to a newer vehicle. One at a time test and diagnose the symptoms and make the necessary repairs. The cruise control and the blower vents are run by vacuum, you have vacuum leak.

Read the JeepForum FAQ's, use the forum search function, use the Google.

.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
CJ7-Tim is offline  
post #3 of 12 Old 06-04-2012, 07:15 PM
cpttuna
Registered User
1998 XJ Cherokee 
 
Join Date: Jul 2004
Location: napoleon ohio
Posts: 128
I would replace all the grounds.
cpttuna is offline  
post #4 of 12 Old 06-04-2012, 09:03 PM Thread Starter
inkei91
Registered User
2000 XJ Cherokee 
 
Join Date: Jun 2012
Location: Battle Creek
Posts: 12
i agree on the maintenance. but i mean like the switch turn the blowers so they are at my feet or head. and i already stated all my grounds are good
inkei91 is offline  
post #5 of 12 Old 06-04-2012, 09:04 PM
CJ7-Tim
Real Jeeps have dents
 
CJ7-Tim's Avatar
2000 XJ Cherokee 
 
Join Date: Apr 2002
Location: out in the garage - Minneapolis
Posts: 24,780
The cruise control and the blower vents are run by vacuum, you have vacuum leak.

.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
CJ7-Tim is offline  
post #6 of 12 Old 06-04-2012, 09:28 PM Thread Starter
inkei91
Registered User
2000 XJ Cherokee 
 
Join Date: Jun 2012
Location: Battle Creek
Posts: 12
what about the misfiring? it was also backfiring from time to time when accelerating?
inkei91 is offline  
post #7 of 12 Old 06-04-2012, 11:18 PM
Reptile
Web Wheeler
1991 XJ Cherokee 
 
Join Date: Feb 2011
Location: Bakersfield
Posts: 1,297
Quote:
Originally Posted by inkei91 View Post
what about the misfiring? it was also backfiring from time to time when accelerating?
Engine control system, vacuum operated as well...
Reptile is offline  
post #8 of 12 Old 06-05-2012, 08:49 AM
CJ7-Tim
Real Jeeps have dents
 
CJ7-Tim's Avatar
2000 XJ Cherokee 
 
Join Date: Apr 2002
Location: out in the garage - Minneapolis
Posts: 24,780
Quote:
Originally Posted by inkei91 View Post
what about the misfiring? it was also backfiring from time to time when accelerating?
Post the exact Check Engine Light trouble code numbers you are downloading.

.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
CJ7-Tim is offline  
post #9 of 12 Old 06-05-2012, 11:33 AM Thread Starter
inkei91
Registered User
2000 XJ Cherokee 
 
Join Date: Jun 2012
Location: Battle Creek
Posts: 12
do you have any idea where the vacuum hose would be that would be leaking? they both went at the same time so im thinking its the same hose
and i got different codes from different readers ill go get them rechecked as i have been erasing them and seeing if they come back. Thank you btw
inkei91 is offline  
post #10 of 12 Old 06-05-2012, 11:47 AM Thread Starter
inkei91
Registered User
2000 XJ Cherokee 
 
Join Date: Jun 2012
Location: Battle Creek
Posts: 12
nvm i found on the side of my engine a totally disconnected hose! idk how it came off but i put it back on and bam! my blowers work fine. but now my biggest problem is that my a/c clutch and cooling fan only come on if manually jumped. im down in oklahoma city and its hot as hell! any thoughts as to why my relays are not engaging? test lighted where power comes into them and just a faint trace of juice. relays are all good
inkei91 is offline  
post #11 of 12 Old 06-05-2012, 12:41 PM
CJ7-Tim
Real Jeeps have dents
 
CJ7-Tim's Avatar
2000 XJ Cherokee 
 
Join Date: Apr 2002
Location: out in the garage - Minneapolis
Posts: 24,780
Quote:
Originally Posted by inkei91 View Post
....my a/c clutch and cooling fan only come on if manually jumped.
If you are low on refrigerant, the compressor will not cycle. Have a shop test the the pressure or buy a kit with a tester. Do not overfill. Also test the high and low pressure switches and inspect the wire plugs/wires.

.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
CJ7-Tim is offline  
post #12 of 12 Old 06-05-2012, 01:16 PM Thread Starter
inkei91
Registered User
2000 XJ Cherokee 
 
Join Date: Jun 2012
Location: Battle Creek
Posts: 12
i just had the refridgerant filled by a mechanic who also checked the high and low pressure switches. he said there was no power coming to the relay to turn it on. could this be my pcm? i replaced it a couple years ago
inkei91 is offline  
Reply

Tags
cherokee , electrical , ground , jeep , wiring

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



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
92 XJ electrical problems kracer93 XJ Cherokee Technical Forum 0 05-03-2009 02:05 PM
window and locks problems electrical problems? mike243 MJ Comanche Technical Forum 1 04-05-2009 06:39 PM
Electrical problems!!please help natexj XJ Cherokee Technical Forum 2 11-13-2007 08:05 PM
Yay, more electrical problems... jbrem XJ Cherokee Technical Forum 2 01-14-2006 12:10 AM
Serious Electrical Problems! Help! nikota XJ Cherokee Technical Forum 14 10-13-2005 04:24 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