Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Jeep Grand Cherokee Electrical Problems



  • I have a 200 jeep grand cherokee that has gone nuts. first the pcm went bad and we fixed that with no problem. but now everything is nuts. I can't communicate with bcm, windows don't work from any door, overhead console won't display numbers at all, a/c will not turn on, instrument cluster goes crazy every now and then, and sometimes vehicle dies as if you just turned it off. it always restarts but will eventually do it again. any ideas anyone.
  • I have traced the wiring harness with a fault finder from the condenser to the fuse block with no shorts detected. I have also replaced the TSP and crankshaft sensor. It mostly happens when it's hot outside (above 80). I can't get it to replicate all the time, but when it happens, I can consistently get it to die when I turn on the AC or defrost. Won't stall the engine with the blower on by itself. Changed the relays and checked fuses and it still stalls. I think it's narrowed down to the AC (automatic climate control) head unit or the PCM. Any ideas?
  • I have a 2002 Grand Cherokee that i bought new. It now has 108k miles on it and i have wanted to trade it off for something else but my wife likes the thing. I am tired of working on it! it all started with the power steering system that i pretty much replaced all parts, and then the window regulators. A couple of months ago the windows quit working. I thought maybe i did something when i put in the new regulator in the drivers door, but couldnt find anything. Then the AC quit working, the overhead computer quit working and the lights did funny things. I searched here online and found one posting where someone found a bad wire in the drivers door and tore back into it. Where the wires go through the rubber boot from the drivers door to the door jamb, i found THREE SPLICED WIRES!!! This vehicle has only been worked on or serviced by myself and i know i have never pulled back the rubber boot. The wiring harness must have been spliced from the factory! I soldered in about two inches of new wire and heat shrinked the splices, unhooked the battery to reset the computer, and IT WORKED!!!! I could have spent thousands on diagnostics in a shop and they may never have found the problem!!! I suppose it just took a dumb farmer to find a problem that was built into the vehicle at the factory. This is our second Grand Cherokee and i can honestly say there will not be a third. Good luck
  • That is weird. I noticed several factory spliced wires in the door and under the dash. But they looked like they were still tight though. But that may not be the case, they could be loose I guess. I will take those wires and add new wire to it.

    Thanks for the tip, maybe this will help.

    Oh yeah, and I hate jeeps now. I do love the 318 V-8 thats in it, so much power and wont get stuck anywhere. But I have had two jeeps now with these strange electrical problems. Sad to say, but I am done with Jeeps after this.
  • smithedsmithed Posts: 444
    :) Thanks to all for the input above:

    All the panel warning lights were intermittently lighting up for a few seconds, then going back off. Thanks to what I've read here, it was easily fixed by cleaning the battery posts and cable terminals and tightening them down well. (2005 Grand Cherokee 3.7L) :shades:
  • In the last few weeks I have had several incidents of my jeep just turning off when I am in the middle of a turn. I have to put it in neutral, then turn the ignition and it just starts right back up. It has only done this while I am in the act of turning. Luckily it has only occurred when I have been slowing down - like turning into the garage or pulling into a drive thru lane. This issue started right after I had the dealership change out the battery (since I couldn't find the battery at any of the local part stores). Could it be possible that something happened during the battery installation that would cause this or is it just coincidence?
  • tuggajbtuggajb Posts: 646
    have you tryed new battery? would try that first as jeeps like realy good battery volts
    when i have helped anyone with eletrical prob i have then change the battery on any of the newer cars as computers are real touchey on volts (you put a serge protector on your computer in your house to smoth out serges dont you) weak battery will charge in serges computer dont like that
  • hi mat

    did you manage to fix your problem?

    I am having similar problem on my Jeep Grand Cherokee 2000yr. When you open or lock the car the hazardlights dont flash, once inside the lights dont turn off, the windows dont work, the memory seats dont work because it says the belt is on but its not, the belt light stays on.

    if you could help me please let me know

  • Hi Guys

    i am looking to see if someone can help me with my Jeep Graand Cherokee w reg 2000 yr. Firsty when you unlock or lock the door the hazzord lights dont flash, the interior lights dont go off, the side interior side lights dont work, the seatbelt symbol stays on the dash, teh funcion to control the volume doesnt work, the windows dont work, the temperature or av MPG doesnt work.
    if anyone can help me please do.

  • Hi Guys

    i am looking to see if someone can help me with my Jeep Graand Cherokee w reg 2000 yr. Firsty when you unlock or lock the door the hazzord lights dont flash, the interior lights dont go off, the side interior side lights dont work, the seatbelt symbol stays on the dash, teh funcion to control the volume doesnt work, the windows dont work, the temperature or av MPG doesnt work.
    if anyone can help me please do. or email

  • After only purchasing Toyota cars for many years, and on an "impulse buy" deciding on a Jeep since they gave me such a great deal, I am already regretting the choice. I love the Jeep- the way it drives and handles, and it fits me like a glove. However, I am wondering if this is a quality vehicle and that if I am already having a problem now, what's it gonna be like in five years??
    Here's the problem: the rear liftgate door usually doesn't respond to the lock/unlock key. I went four days straight with being unable to get the liftgate to lock, even though all the other doors work fine. I would stand by the liftgate pressing the "lock" mode on the remote key fifty times- no response. When the liftgate would lock on rare occasion, then it would go days without my being able to UNLOCK it!! Any thief could have opened that rear door, crawled in and taken anything he wanted!! I took it back to the dealer only a WEEK after I bought it and had the service department look at it. they replaced the actuator and the latch, thinking that would fix it, but no.... I now have another appointment with the Service department in a few days. My hunch is that either this is a simple problem , i.e. a wire that needs adjusting, or it's a complex electrical problem that might never be fixed. if it's the latter, I'm wondering what my protections/rights are as a consumer...anyone have advice on this?? I have only had the car for a month! No brand new car should have this problem.
  • I found spliced and broken wires where the drivers door hinges. I fought electrical problems on my 02 for a while until i found and fixed this problem. Also, when my battery gets to be a couple of years old, it starts doing strange things. The first place id look is in the rubber boot from the drivers door to the door jamb and check the integrity of the wires there. Good luck!
  • eridererider Posts: 2
    Well, after two days of it being at the shop, and checking just about every wiring configuration in the vehicle, it was determined that the junction box, which contains a lot of wiring, was defective somehow. this vehicle never should have left the factory floor with that defect- I guess the person in charge of quality assurance was out that day!
    thanks for the reply Farooq. but it sounds like you know a lot more about electrical problems than I do. Electrical problems can be hard to diagnose. I know some European models are notorious for electrical problems. anyway, the problem is fixed and I hope to enjoy my new Jeep for many years.
  • My Jeep, a 2005 5.7 liter with 39,000 miles just got stuck in 3rd gear (5 speed automatic) as I was cruising at 65MPH while in Drive. The vehicle has the 8/4 gas saving feature. The dealer has had it since yesterday morning and says it may take yet another couple of days to figure out the problem, and that the problem is probably electrical. I put a new battery in one month ago. Any ideas, relay of similar experience, would be welcomed.
  • smithedsmithed Posts: 444
    It sounds as if the transmission has gone into the "limp home" mode, which usually is due to a malfunctioning sensor input to the transmission. However, the dealer should be able to find a code quickly from the OBD computer. It shouldn't take days to do that. The 8/4 (MDS) almost certainly has nothing to do with the problem. :)
  • 2000 Jeep Grand Cherokee problems
    . Does not Work
    1. Windows
    2. Automatic head light sensor
    3. Door locks
    4. Temperature Display (not eng) outside temp
    5. Map lights stay on (if setting is on auto)
    6. Air Conditioner compressor does not turn on
    7. All gauges do not work ( work briefly if i press on the brake)

    I sent my Jeep to a mechanic I had problems my gauges did not work and he said it could be a coil spring or ignition. He serviced my vehicle and changed the ignition. That did not fix the problem but the items listed above do not work. He did
    a diagnostic check and the computer would not respond. He said my accessory control was most likely bad. He checked the coil spring and said it was good. He said most likely I should take it to the DEALER.

    I would press on the brake my gauges would work briefly.
    If I would put my turn signal my gauges would work briefly.
    If I turned my wipers my gauges would work briefly.
    My windows would roll down if I would stop and turn off my ignition. Now they just don’t work
    I would be driving and my turn signal warning chime would go off.
    The jeep has stalled three times but started back up.
    All the vital stuff works such as Turn signals Head lights
    I have not had any problems with the transmission or engine it works just fine. Except when it stalled those few times.
    I can hear a clicking noise under the dash it sounds like a relay clicking.

    I since have sent it to the dealer (bunch of yahoo's) they have never seen the problem. RIGHT! look on the internet I am not the only one. They diagnosed the problem as the instrument cluster.

    I tore into the dash this weekend and looked for all the posted possablites and I found no corrosion no spliced wires in the boot of the door.

    I did find a burned connector for the ac as soon as I touched it was Hot and then the blower turned on. This part is called a Resistor for the blower fan. (OEM INSTALLED RESISTOR SYSTEM FLOW SENSOR (DELCO MODEL #16250779, SERIAL #0304021) I went to the dealer got a quote for the part and casualy asked him if he had a lot of call for this part he said yes. I asked if there was a recall on it he directed to the service deptartment and there is no recall. Funny thing is that they also sell the connector to replace the melted male adaptor.

    I just want to know if anyone has checked this sensor its located under the passenger dash next to the blower.

    I just wonder since this Fried under the dash if this has caused some sort of ground or actually fried the computer and I wonder why It did not blow the fuse...Its unplugged for now until I replace it. Since I have disconnected it has not helped the guage issue. I now notice that the window control on the door makes
    a clicking noise and turns on and off from door to door I am just wonder if this could be a multiude of problems. I used to love my jeep. As the saying goes if you love them you must let them go..
  • smithed: thank's for response. The dealer finally delivered the Jeep on Monday, 10/13 in the early pm, fixed, said the computer check was negative, tech. traced problem to two bent prongs on a wiring harness connector, straightened them out, billed me $518.00.
  • hi
    i had problems with my electrical windows, door lights would not go off, the memory seats wouldnt work, the temp sensrs and dash wouldnt work, temp wpould not give accrate reading.

    i got an auto electricain who looked at the door switch and re powered it and all the problems went away. all i need now is the code for the sterio.
Sign In or Register to comment.