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Jeep Grand Cherokee, Electrical, SUV
#326 of 735 2002 GCL Laredo Electrical Problems
Jun 14, 2010 (4:17 pm)
I own a 2002 Jeep Grand Cherokee w/ 4.0 6 cyclinder engine. Similar problems posted by others with electrical problems.
Car seems to have a mind of its own. When the car is started, occassionally it will stall out within seconds after starting. Other times it will start right up. However, once it's running the gauges can go crazy, odometer and speedo. The Battery, gas, and oil gauges will die when other electronics are turned on such as the lights, ac, or radio. Or upon turning other things things will turn off. Also, the AC never seems to be kicking on. The lights are dim, sometimes the mileage indicator will turn off. Immobilizer light, Airbag, and other warning lights will turn on. Not sure what the problem is, but I can say the CPS sensor has been replaced, the wires running through the driver door are intact and good. I'm trying to narrow down what the problem could be and any help would be appreciated.
The problem is intermittent. Has been happening every few months for the last two years, but goes away on its own after a few weeks, leading me to believe there is an exposed wire somewhere.
Also, here is a link to a youtube video of my problem, take a look:
#327 of 735 Re: elec. problem [toddb2005]
Jun 14, 2010 (5:56 pm)
I have the same problem, but no solution. The best post I have read that makes sense to me as an electrical engineer is #297: multiple loose grounds behind the dashboard.
My JGC is '06 with 48k miles. I will sell it before I replace the BCM. These issues happen very infrequently.
#328 of 735 Re: 2002 GCL Laredo Electrical Problems [mwatk025]
Jun 15, 2010 (3:11 am)
How old is your battery? Even though it may have 12 volts does not mean it's good for your jeep. I notice in the youtube clip the voltage on your dash reads close to 12 volts. I have a 2004 GC Lmt. It started acting up in its performance. The battery showed 12 volts. I replaced it with a diehard gold and had no further problems. It needs close to 13.5 and over. If the battery is aged, change it. I hope this works for you as it did for me.
#329 of 735 Re: 2002 GCL Laredo Electrical Problems [topat46]
Jun 15, 2010 (7:15 am)
Changed the battery within hours of taping that video. It's Brand new and now reads much closer to 14.
#330 of 735 Re: 2002 GCL Laredo Electrical Problems [mwatk025]
Jun 15, 2010 (9:18 am)
Did the battery fix your problem?
#331 of 735 Re: 2002 GCL Laredo Electrical Problems [mwatk025]
Jun 15, 2010 (9:36 am)
Ok, read your original post better, its been happening for 2 years intermittently, so you don't know yet if battery fixed. It may not have been battery, as 2 years ago it was probably still good, but you are asking for problems with the low battery you had, so 5 year old battery that was low was ready to be replaced. Do you happen to recall if battery gauge was close to 12vdc 2 years ago? It could have been since it was already 3 years old, but seems strange it made it 2 more years. Also in your video, lots of strange things happened after you turned engine off, that was probably the low battery not powering relays and sensors correctly. The battery should fix that, but just worry about things that happen with engine on and driving or at initial start up. My low batt caused warning lights at start up to not extinguish, also come on during drive, and gauges went crazy at start up. Then one day the car would not crank, no lights, etc, called AAA, they came and tested battery, it was at 12vdc which i was informed was not enough juice to turn on computer which would let other things work, he put new batt, and 99 6cyl laredo has been fine ever since, i hope that fixes you, post back in a month if you see better results.
#332 of 735 Re: 2002 GCL Laredo Electrical Problems [barryz]
Jun 15, 2010 (10:15 am)
I can't recall where the battery was reading was two years ago, but since replacing it the gauge has been reading right at 14vdc. I mentioned that the problem was intermittent, I meant that it happens and will stay consistent for a few weeks and then one day i'll go out to my car and it'll just start running w/out any problems. It's currently in one of those states where it'll turn on but a/c is not engaging, or when you turn on one thing, another will shut off, or all the gauges will shut off. In the next week or two i'm going to bring it to a recommended electrical specialist and see what the diagnosis is. I'll keep you posted of any changes. Thanks for the help.
#333 of 735 Re: 2002 GCL Laredo Electrical Problems [mwatk025]
Jun 15, 2010 (2:13 pm)
A/C not engaging? It won't engage if r134 is low, if you have never added to a 2002 it may be just a little low, they sell cans of r134 at any auto parts store, with a gauge built into dispenser. If not turning on at all you may need to add a whole can or more. I got a good deal at BJ's warehouse club, 2 of the bigger cans for 25 bucks, thats almost half price to walmart where 1 big can is close to 20. I have had a slow leak for over a year. Last summer a large can could get me 3-4 months of constantly weekly check and top off, this year leak is faster i may need to let a specialist find the leak. Anyhow, if you are very low, as you add, gauge of can will appear to be cycling over pressure then down to zero and back up, ignore that, keep filling to it levels out, you will hear compressor engage as pressure corrects to good level and fill to correct spot on gauge. Last year i was able to slow down my leak by using a can of heavy duty sealer that can do more than just refresh rubber gaskets, can help seal metal leaks, that did not completely fix but got leak much slower, this year my first can was the one that also has ac oil in it, i figured i must be low with a constant leak, that can leaked quickly and another big can was needed to fill up again, as i said i will probably have to take it in to repair, hope its only a bad hose and not something else, i tried leak detector and uv light, but did not find leak.
#334 of 735 Re: 2002 GCL Laredo Electrical Problems [topat46]
Jun 15, 2010 (6:13 pm)
My battery was original from Aug of 2005 GCJ. Almost 5 years so I had it changed. So far nop problems in the last week.
#335 of 735 Re: '04 Jeep Grand Cherokee Driver Door Electronics Quit Working [mickyb1]
Jun 27, 2010 (1:12 pm)
I am new to this forum, but if this message gets posted, I just wanted to thank Mickyb1 because I also found a broken wire that had made all my windows go dead at the same time... It was an easy fix, just hard to find since no fuse or circuit breaker relay was broken. Thanks...