Last post on Nov 07, 2013 at 9:41 PM
You are in the Jeep Cherokee and Jeep Grand Cherokee
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Jeep Grand Cherokee, Electrical, SUV
#549 of 735 Re: 2005 Jeep Grand Cherokee Laredo-a crappy Chrysler product! [lroyea]
Oct 08, 2011 (11:56 am)
Hi. We bought a 05 JGC a year and a half ago and have been experiencing the same issues as others on this forum...currently, the headlights are flickering on and off so we can drive it at night. This seems to happen more often when we use the turn signals so not sure if that is triggering it? I replaced the ignition switch thinking that might be it, but did not work.
We were also having the transmission problems of it slipping in and out of gear. We had the transmission check by a transmission specialist and physically it was fine and they said it's probably something electrical causing it like the transmission control module. We just took it to our Jeep Dealership finally to have a diagnostic run and they said it was giving them error codes that the Transmission Control Module was bad. They replaced it a few days ago (almost $900 for parts + labor) and hasn't slipped since, but we'll see with time.
Meanwhile, the same funky electrical issues continue (lights flickering, fan/ac/heat only works on high, etc.)
After much, much research online trying to diagnose and fix these problems it's amazing that there is nothing anywhere from an actual Jeep tech or mechanic about this issue and how to fix it.
Please post if you find a solution and will do the same.
#550 of 735 Re: 2005 Jeep Grand Cherokee Laredo-a crappy Chrysler product! [agreen74]
Oct 08, 2011 (1:23 pm)
My now stock reply to so many messages like yours is...
it is the main wiring harness for the "bus circuit" for which your electrical system is indicating a problem. I believe there are three bus circuits.
A qualified Jeep technician can talk to you about this and how they indicate failure of components. Jeep dealers have a sophisticated computer diagnostic that is far superior to what the small mechanics typically use. It will point to modules more often than to the actual wiring harness. In fact I am not sure if their (or any) diagnostic is designed to and can detect a faulty harness. (?)
I replaced many modules and some twice to almost $2100. After all that I replaced two harnesses and my Jeep 06 GCL has been running as smooth as can be ever since.
See my earlier posts for more info re wiring harness
Recently I did replace the right rear wheel speed sensor which failed and, while I was at it, replaced the spark plugs. Typical recommended mileage for spark plugs is 40k... and mine went 105k.. wow !!!
The gap was at least twice normal but now with new plugs with perfect gap I am still not getting any difference in MPG. go figure.
QUESTION: has anyone noticed that after turning a corner the Jeep loses acceleration power curve until on straight path. almost like to old carbs with a float valve?
#551 of 735 2001 grand cherokee larado pcm failure
Oct 08, 2011 (3:13 pm)
bear with me, bought my jeep new in 01, this year at 130,000 miles, replaced trani with new, fuel filler pipe, brakes, (always with the brakes) fuel line, muffler, rear end, have always maintained perfectly, now my pcm is gone, have been in contact with chrysler for three weeks, ordered part, they have no idea when delivery, hundreds on back order, even after market are on back order, apparently, according to dealership(s), the 2001 jeep grand cherokee is the only one (4.0) that is vin specific, can't reprogram a used one, and chrylser dealers have none, they are saying 6 months to a year, meanwhile, I have no car....this is my third jeep, all have gone 250,000 with good routine mileage, I can't get to work, etc....their answer, buy a new one, WHY!!!! for want of a $700 part, I would have a great car, no damage, rust, I have been meticulous with this car, and yet chrysler has no part for only this year/engine... why was there no recall, should a class action be started.... my jeep is a very expensive planter...I have put $8000.00 into it since June.... what the heck can I do...HELP!
#552 of 735 Intermittent turn signal operation
Oct 16, 2011 (9:00 am)
Has anyone seen this? I have a 2001 Grand Cherokee limited and about 3 weeks ago I noticed the left turn signal was not working. I parked and forgot about it. The next few days I saw that it was working???? It has quit about 3 or 4 times since but always works the next day. I plan to change both the front and rear turn signal lamps but any ideas after that???
#553 of 735 Re: 2000 Grand Cherokee Ltd. Update [bee007]
Oct 19, 2011 (8:45 am)
I am havin the same exact problem to a tee with mine. we have spent thousands trying to figure this out. mine is throwing a 1686 code, all the warning lights are lit, gauges dont work, and the electric windows only work when the car is in the accessory position, but not when the car is running..did you ever find out what the issue is or whats bad????
#554 of 735 Re: 2000 Grand Cherokee Ltd. Update [hpalmatier]
Oct 19, 2011 (12:51 pm)
did you ever replace the ignition switch?
#555 of 735 Re: 1996 jeep grand cherokee electrical trouble [larchave]
Oct 20, 2011 (12:54 am)
The problem is the PCM. Thee two screws are grounding the motherboard. Replace the 3 bolts with plastic ones and keep the PCM away from the firewall. The PCM is sending the wrong signals to your sensors that's why your having problems. Next your car will be backfiring.
#556 of 735 Re: 2000 Grand Cherokee Ltd. Update [tuggajb]
Oct 20, 2011 (9:36 am)
going to try the ignition switch today. should know by tonight if that fixes the problems.
#557 of 735 Re: 2000 Grand Cherokee Ltd. Update [hpalmatier]
Oct 21, 2011 (12:12 pm)
tried the ignition switch, still having all the same problems..anymore ideas???
#558 of 735 Re: 1996 jeep grand cherokee electrical trouble [melbistylz]
Oct 22, 2011 (4:32 am)
To melbistylz, regarding the PCM. I originally posted with a intermittent, now fulltime issue with the remote door lock and gradual loss of speakers in the stereo system. I had done some research in the Jeep shop manual and suspected that the PCM was the culprit for both issues. Both the remote lock/ unlock system .and the stereo speaker wires seem to be run through the PCM. Can you respond to my suspicion and offer a solution if possible? If you need more info, please let me know. Your thoughts would be much appreciated. I can give you my email in required. Thanks!