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Jeep Grand Cherokee Electrical Problems

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  • Here's the problem with my 1997 Jeep Grand Cherokee.
    Out of nowhere, when I go to get in the vehicle, as soon as I open the door, the heater fan comes on with no key in the ignition. The heater fan switch is in the on position when this happens but there is no key in the ignition and the ignition is in the off position. It happened a week ago and it killed the battery. at that time, I charged it and started it and shut it off, but its almost like the key was still on but it wasn't. The dash lights went off with the key but the fan and blinkers still had power.
    I unhooked the battery and waited a minute, hooked it back up but the fan blower and blinkers still worked with no key on. I unhooked the battery overnight and the next day everything was ok after I rehooked the battery.

    Today I opened the door and the fan started to run with no key in the ignition.
    I left the battery unhooked for a few hours, hooked it up and the fan didn't come on, until I opened the door.

    This is a nice vehicle but when I figure out the problem it will be up for sale.

    Any clues from anyone?
    Thanks, Dan
  • My Grand Cherokee is a 96 My post above I put 97
  • Radio doesn't work and radio lights pulse on and off after you start the car... If you just turn the accessories on the radio works fine...

    No running lights, with the car running or off... All other exterior lights work...

    Dashboard lights don't work...

    Speedometer doesn't work...

    If I open any of the passenger doors there is a relay near the glove compartment that starts clicking...

    Interior lights on the door are on when the car is running and the doors are closed... they get brighter and dim with the same pulse that the radio lights are blinking, whether or not the radio is on...

    Interior ceiling lights are also affected...

    Fuses are all good...
  • I just purchased an 05 JGC 2 weeks ago, and just this morning on my way to work, I experienced the dash panel lights all turn on at once, then while that happened, my speedometer, and gas gauge dropped and rose again after the lights went back off. It happened twice, and I'm pretty sure this thing has some issues, which breaks my heart because I love the car. :(
  • I just bought a 1993 grand cherokee laredo - the problem is -- the voltage gauge drops from 14-18 at start up down to 9 or lower as the jeep warms up or I turn on heater, lights, wipers and then wants to stall. The alternator is new but had it checked twice to make sure was working right, the starter is new. I even tried changing the PCM with one from another 93 ( wouldn't even start ). I put the original back in and the jeep started up. Not sure what to do now. any help would be greatly appreciated. Thank you -- George
  • tuggajbtuggajb Posts: 646
    take volt meater and make sure that the alt is in fact worling when on your jeep
    check wires by batt for corasisen
  • tuggajbtuggajb Posts: 646
    how old is batt?
    if have a bad cell could cause computer to act up
    if new could also be the engnition switch (mounted on the bottom of steering coluem i think on the 05s not real sure though)
  • i have a 93 grand 5.2 LT. me and sum friends were on our way back from the coast when one of them turned the light on to the upper center console when the console light radio and computer screen went haywire is this a a fuse problem or a wiring problem and since tuesday i lost heater power door locks and all the above items i have listed ne help what so ever would be great thanks. If you would like to reach me directley you can from e mail or my space my email is bigsexy_fordlover@yahoo.com
  • tidestertidester Posts: 10,110
    If you would like to reach me directley...

    If you keep the discussion here then everyone benefits. :)

    tidester, host
    SUVs and Smart Shopper
  • boveebovee Posts: 3
    I have a 04 JGCL, it has been in the shop 3 days now and is racking up labor cost. It seems to shut off whenever I hit any bumps in the road, at high speeds, only the speedometer and fuel gauge seem to be effected, they zero out and then come back. At slow speeds, when I hit a bump, it stalls. Mechanic says it is a short (no kidding!) but he can't locate it. Has anyone else experienced the same problems?
  • tidestertidester Posts: 10,110
    That doesn't sound like a short. It sounds like a broken circuit or bad switch. Have they checked all the electrical connections?

    tidester, host
    SUVs and Smart Shopper
  • boveebovee Posts: 3
    not sure what they have or have not checked, I got frustrated with the mechanic and picked up the truck today, now it won't start at all and the fuel gauge is reading empty, the low fuel chime keeps dinging, and when I drove it home, it had 3/4 tank. What kind of circuit or switch should I be looking for, and could this be a bad fuel pump or sending unit? thanks for your help.
  • tidestertidester Posts: 10,110
    The speedometer and gauges are all electronic and there are a number of electrical connections between the battery and these components. The problem could be at any of those junctures. I don't have hands on experience and don't know how accessible any of those would be so we'll have to wait for someone knowledgable to jump in here - anyone?

    I am a little surprised the mechanic didn't pick up on any of this (electrical, fuel pump, sending unit, etc.) if starting it is such a problem. Perhaps a new mechanic would be helpful?

    tidester, host
    SUVs and Smart Shopper
  • I have a '97 JC/XJ that I bought used. Ive had it since early '01, all power options. Its always had electrical problems. Im thinking it might have something to do with the remote start the previous owner installed...

    First off, sometimes, most times actually, when I roll down the rear window on the driver side, the locks trigger. And then I cannot lock the car without doing so manually for a undetermined amount of time. Also, sometimes the car simply will not start, after I drive it for any length of time. Put the key in and the dash comes alive, but the engine wont turn over. I have to wait anywhere between 5-15 minutes typically for the engine to start. Doesn't matter if I take the key out or anything. Seems like the computer needs to reset?

    Ive asked various mechanics and they all have no idea. Ive never had the money to hunt down the problem...
  • Bought a 2004 JGCL last August. Figured I would get something newer so my vehicle wouldn't nickel and dime me to death. Sadly mistaken.

    3 weeks ago I had to have the Throttle Position Sensor replaced, after doing some research this seems to be a common problem. (rough idle, rpm fluctuations in cruise control, high idle at startup regardless of engine temp.)

    I had some electrical problems. My radio quit working intermittently. I had to mess with rear driver side window button to get power to the radio. Last night driver side windows would not work. This morning none of the windows will work, instrument panel light cluster is lit up like a Christmas tree, fuel gauge, speedometer, tach does not work.

    I think that it is a problem that has to do with a short and moisture in door panel. This issue happens mostly after rain or if there is a melt from the winter. Does anyone know if there were any recalls? This seems to be a common problem.
  • I got a 94 Jeep grand Cherokee Laredo 4.0 6cyl. automatic. not a 4x4.. it just started to sputter recently; then die. i'm able to turn it over again and it will be fine for a day or so. I checked the fuel pump by disconnecting the the lines from the inline filter. turned it on the on position yes pump was fine .however i did change the filter it was there and disconnected and only 12 bucks ....why not. Worked for another day and a half. started the same thing...... was acting like it was running out of gas bucking and what not. i popped the hood then i got a better idea of the prob. ...the engine stalled then i started to hear shocking like something was arching somewhere. i ran around to turn off the car and my tachometer was jumping like crazy from 0 - 6,000 rpm + up and down in variation. i cleaned my posts and dis cap. it seemed to be fine for about 8 miles and started again. please do you know what this is? i'm up for options and ready to get dirty. please help? :confuse:
  • Ok. I went out and bought a used 85 JGC with a 95 4.0L transplanted into it for 700.00 bucks, solid as a rock, no leaks, runs, drips, or errors. Simple, eh? Nope. Apparently the previous owner was committed to a local "sanity re-establishment facility" due to the Jeeps proclivity to eat batteries. As far as I've been told he managed to ascertain that there was some sort of voltage leak but could not narrow it down to which system the gremlin had taken refuge. At that point, he ripped out most of his cranial skin with his hair and subsequently had to be sedated and rushed to a doctor. Witnesses were heard to say that there were muted cries of "Only in a Jeep? ONLY IN A JEEP?" emanating from the back of the ambulance. So I put it to you, dear readers; where do I start looking? :confuse:
  • AH HA! Part DEUX......So I was looking around under the dash, and I noticed a few things...First, the dome/overhead console fuse was blown. Second, the rear wiper fuse was on vacation. Third, the ignition circuit tag under the dash on the fuse block itself has some sort ot cobbled up wire running from it to some unknown point within the dash.
    And now for something COMPLETELY different...so the power lead to the main fuse/relay assembly underhood seems to be the area of suspicion. I did the ye old "remove a lead" method to see if I could elicit a spark, and VIOLA'! a flash of energy. So its somewhere within there.

    The search continues...
  • I'm having a problem with the window and door lock controls on the driver's door of my 04 Grand Cherokee. My remote unlocks all of my doors except for the drivers door and none of the windows will roll down. The doors do not lock when I hit 15 mph and the interior lights stay on the entire time the vehicle is on. They eventually dim out when I turn the vehicle off and lock it, but it's taking a lot longer for them to turn off than usual. I've checked the fuses inside and under the hood and all looks well. everything else in the vehicle seems to be working fine. Any ideas?
  • Ok..it sounds like either the lock motor on that particular door has gone south. Since that door gets all of the primary use, its not uncommon for the motor to wear out or get tired and weak. You didn't specify if the lock works when you use the button for that specific door though. My money is on the lock motor.

    Although...it also could be the ECM. Sometimes those damned things act up after a rain or if ANY moisture gets in them at all. I've pulled a few where the carpet and surrounding areas were bone dry and yet the ECM showed signs of moisture damaging and shorting.

    I'd have your local dealer put the ECm on a SOLUS device and check it out.

    Thats my opinion, though...ain't worth much...LOL
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