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Jeep Grand Cherokee, Electrical, SUV
#37 of 735 1998 Jeep Grand Cherokee TSI Evil Electrical Demon
Aug 13, 2008 (7:10 am)
The run down:
1997 Jeep Grand Cherokee TSI V-8 4X4
The jeep runs great at all speeds, as well as the transmission. It is pretty much sound mechanically. But electrical y it is evil.
The dash gauges do not work. The interior Lights will not go off. The power windows will not work on any door. I had to remove the interior light fuse just to get them to turn off. When you put the fuse back in, the relay clicks repeatedly, then seems to quickly drain the battery. It SEEMS that as long as the fuse is out the battery stays charged.
The radio and fan both work. The power seats work as well. The information center on the upper console and the larger display information center that has a digital picture of the jeep located near the shifter both light up, but display no information (outside temp, compass, etc.), just hyphens. The bottom info center that has a picture of the jeep will not show that a door is ajar when it is.
I have checked all fuses and circuit breakers, but all are good.
I have taken it to two shops that gave up and told me to come pick it up (I figure because they did not want to mess with it). The third shop I took it to told me that the BCM would not communicate. And that I would have to buy a new BCM at the dealership and have the dealership program it to my jeep. I took it to the dealership and had the new BCM installed. They told me that it made no difference and that it was still not communicating. Why would a new BCM not even communicate? The problem must be before the BCM.
The dealership said that they will not do anymore diagnostics on it because it has been gone through by too many other shops. All wires that have been messed with are still in-tact though. I am to the point to where I am willing to dismantle the dash and dig in. But if I could get some ideas on how to go about this, I would be very grateful.
Please note that the lights behind the gauges do work just not the needles themselves.
So after over $1000 of spending I still have the same Jeep I did at the start of all this. I cannot take it to anymore shops as I will probably end up spending all together, more than the Jeep is worth.
Could this be an ECM/PCM issue?
#38 of 735 2004 Jeep Grand Cherokee window & auto lock problems
Aug 13, 2008 (2:57 pm)
My windows have started to periodically not work. My sunroof works fine. Also the power locks which are programmed to auto lock (at 15 mph) & unlock (when drivers door is opened) only work with the manual button on the door (just started that today). Has anyone else had this exact problem and if so, where you able to fix it??
#39 of 735 Gauges going crazy
Aug 15, 2008 (11:23 am)
I have a 99 4x4 Grand Cherokee Laredo and am having a problem starting. It only occurs from time to time. When I turn the key it clicks and all the gauges bounce back and forth and continue to bounce even after the key is removed. If I keep trying it will eventually start. The first time it happened I pressed the brake and the gauges registered normal and it started. This morning the gauges started bouncing again then it finally started but now the gauges are dead.
#40 of 735 Re: 1998 Jeep Grand Cherokee TSI Evil Electrical Demon [eviljeeptsi]
Aug 16, 2008 (7:24 am)
Did you find a cure for the evil demon? I have a 1999 jeep Gran Cherokee with the same symptoms and am pulling out my hair. Nothing I have done mitigates this problem and like you no shop has been able to diagnose the problem. I'm ready to give it away.
#41 of 735 Re: Gauges going crazy [jcarey1]
Aug 16, 2008 (4:16 pm)
i would try and change the ingnition switch
#42 of 735 Re: 1998 Jeep Grand Cherokee TSI Evil Electrical Demon [ratt454ss]
Aug 18, 2008 (10:19 am)
The dealership told my girlfriend that the radio was skipping because a "stuck seek button". I know that can't be the problem because it skips randomly when playing a CD. The check engine light went after changing out the O2 sensor and adding a new air filter. The spark plugs have since been changed and so-far so-good (knock on wood).
I think the problem with the radio lies in the steering wheel as it has controls on the back of the pillars. The buttons seem like they've been mashed beyond function and don't work when pressed.
As for the gauges, I would *GUESS* there is either an electrical short somewhere throughout the vehicle, or the ignition is bad. I would look for articles or posts on that problem elsewhere. Also, if you can find a Haynes' Manual for you Jeep, I would. I will as soon as I finish this post...Good Luck!
#43 of 735 Re: 1998 Jeep Grand Cherokee TSI Evil Electrical Demon [ratt454ss]
Aug 19, 2008 (8:53 am)
Nope, note yet. I know what you mean when you say you are ready to give it away. I would, but its so hard to when it runs so good. I just picked it up from the dealership yesterday with no leads from them. I did get some good leads from other forums. I have been told that my BCM must not be getting power. Being that it is new, it must note being getting power since it is not communicating.
I have been given a list of wires and areas to check that would most likely be the problem for the power outage. So as soon as it quites raining I will be digging in.
I will let you know if I fix it.
#44 of 735 Re: Cruise Control and HVAC Mode Control [paulmik]
Aug 29, 2008 (7:55 pm)
i hope u have fixed this problem by now. your problem should be under the battery tray there is a vacuum line thta has a hole in it. seen to many like this.
Aug 29, 2008 (7:59 pm)
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.
#46 of 735 2001 Jeep Grand Cherokee Limited AC/defrost stalls engine
Sep 03, 2008 (3:20 pm)
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?