Question about 1999 Jeep Grand Cherokee

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About 3 weeks ago we took a trip of around 300 miles with my 2000 Jeep Cherokee Sport 4.0. After about 100 miles, the check guages light came on and the volt(battery level) guage went to zero like it shut off. I stopped and shut off the car and restarted it and the volt meter started working again, but only reading about 12 volts instead of 14 or so where it usually is. We kept going and every time i shut the car off and restarted it, the guage would shut off at about 30 or 40 mph. The battery was not charging, and I stopped and bought a new battery and put in it to get where we needed to go. I unhooked the cables and made a appt with a nearby garage to have it looked at. It set unhooked for a day and a half, and when i hooked it up to take it to the garage, it was charging fine. The garage checked it over, said the altinator was fine, but the battery cables were wore and they replaced them. They checked all other wiring and said it was fine. The Jeep worked fine all the way home and has worked fine for the last 3 weeks or so and this morning, it started doing the same thing. Gauge reading low and then shutting off, and check guages light comes on. Altinator seems fine, just not charging. Anyone have any ideas?

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  • nywolfff Aug 23, 2010

    Do you mean the cable that grounds the battery to the chassis, or a different cable?

  • nywolfff Aug 23, 2010

    About 3 weeks ago we took a trip of around 300 miles with my 2000 Jeep Cherokee Sport 4.0. After about 100 miles, the check guages light came on and the volt(battery level) guage went to zero like it shut off. I stopped and shut off the car and restarted it and the volt meter started working again, but only reading about 12 volts instead of 14 or so where it usually is. We kept going and every time i shut the car off and restarted it, the guage would shut off at about 30 or 40 mph. The battery was not charging, and I stopped and bought a new battery and put in it to get where we needed to go. I unhooked the cables and made a appt with a nearby garage to have it looked at. It set unhooked for a day and a half, and when i hooked it up to take it to the garage, it was charging fine. The garage checked it over, said the altinator was fine, but the battery cables were wore and they replaced them. They checked all other wiring and said it was fine. The Jeep worked fine all the way home and has worked fine for the last 3 weeks or so and this morning, it started doing the same thing. Gauge reading low and then shutting off, and check guages light comes on. Altinator seems fine, just not charging. Anyone have any ideas? If it might be the "earth cable" where would that be?

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Hi this sounds like the voltage regulator on the alternator, maybe you should get the alternator changed out as this really would be the logical thing to do, i am surprised the garage did not suggest this as that would be the normal course of action to do if the battery is not charging, you will get things starting to go wrong and start playing up if no correct charge is going into the battery, you can check this yourself, if you can source a volt meter, connect it to the battery, let the vehicle idle for a few minuets and check the voltage, it should read between 12 and 12.5 volts on idle, then take rpm to 1000 and then it should read 13 to 14 volts anything over this is bad and will damage the battery, anything under the 12 will not charge the battery...hope this helps please vote and rate thanks

Posted on Aug 23, 2010

  • steve morris
    steve morris Aug 24, 2010

    hi the earth cable is normally the black one coming off the battery, if you follow that back, it should just connect to the body of the vehicle, remove the bolt securing it, clean the area that it connects to the body, and also the connection on the cable with some emery paper or wire brush then re-connect it again , but i still would get the alternator checked out better first

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Check the earth cable from the engine to the chassis ,dont know where it is though to be honest offhand

Posted on Aug 23, 2010

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