Question about 1999 Jeep Grand Cherokee

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Check gauges light comes on and voltmetr drops to zero.drains battery to the point engin will stop

Posted by healey1234 on

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  • Anonymous Aug 22, 2008

    i've change the alternator, the battery terminals,and the battery and still have the volt gauge drop to half way between 9 volts and 14 volts when i put on my headlights and air conditioning.

  • Anonymous Aug 27, 2008

    Replaced battery, alternator, fuses, checked wires, checked output on alt, and replaced computer, and still the check guages light comes on at random and the alt guage drops to zero.

  • pureice027 Sep 09, 2008

    2000 jeep grand cherokee limited, v8- same problem- check gauges comes on , battery starts draining and dies. We have replaced the battery, alternator (per the mechanic's advice) checked and replaced all fuses(he also checked all of them and the wires). All good- still won't stay running for long. Every time, we take the new battery up to have it recharged. It starts just fine with new charge, volts only at about 11.5 though- and slowly starts going down until it dies. Another trip to recharge battery.... Mechanic is kind of baffled-

  • ozmegoz Jan 01, 2009

    I have a 1997 Grand Cherokee Tsi with a 5.2. Alernator gauge registers 14 at start, slides down to 10 and then finally shuts down completely. If I turn the vehicle off and restart the gauge goes back to 14 and either stays at 14 or slides back down to 10 again and back to 14 or down to zero again. Restarting always brings it back to 14 or 10. Putting on the brakes also has an effect on amperage.

  • rhong411 Jan 13, 2009

    2002 Jeep Wrangler. Recently replaced starter (Aug '08), ignition cylinder (Nov '08), and never missed a schedule maintenance. A month ago (Dec '08), 3 weeks after the 60k maintenance, the "Check Gauges" light came on on daily basis, particularly after I drive to close my destination and came to a stop at red light or stop sign. It went away after two weeks. It started again after two weeks of normality, and started again on random days. Took it into the mechanics, they did a complete diagnosis, hook up to the computer, and still can't find anything wrong.... Battery voltage, temperature, everything appears to be normal. No weird noises, and when I google search the term "check guages" it auto fill in as "check gauges jeep" and it shows many other Jeep owners with same issues, even more so on Cherokee than Wrangler.

  • Anonymous Jan 21, 2009

    truck will not start or something kill in the middle of driving it



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The PCM has the voltage regulator inside it that controls the charge from the alternator to the battery, unlike older vehicles that have the voltage regulator directly on the alternator. Also there is a battery temperature sensor under the battery that the PCM uses to decide how much to send the battery. Possibilities; bad alternator, bad PCM, bad battery temp sensor, bad battery, and bad connections. Battery tests are easy check when fully charged should get around 12.5v then turn on headlights for 2 minutes and check again should still be around 12v. To test charging system start engine and test at bettery terminals should get 13-15v if not then something wrong with charging system take alternator to advance auto and they will test it for free if its good you are down to connections, PCM and battery temp sensor. test battery temp sensor at 75 to 80 degrees fahrenheit should get 9000-12000 ohms resistance (9k-12K ohms) if thats good check ground connections on vehicle body , connections on alternator, and plugs into pcm as well as the two above it (depending on model and year). If all that is good your PCM is bad get one on the internet preprogrammed for your vin number for $250 if you get one at the parts store it is $250 and then you have to get it programmed about another $80. You can also test the alternator your self by disconnecting the 3 tiny nuts and removing the connection from the field terminals (plastic piece with two terminals) and checking again at battery for 13-15v ( stay away from pulleys and belt,no loose clothing or long hair if you value your health). The PCM shorts the field connectors to regulate the voltage so removing that connector eliminates the PCM , battery temp sensor and the wire to and from them.

Posted on Mar 07, 2009



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Finally found the problem! There is a wiring connector just above the computer that was corroded and loose with a bad connector. I took the connector apart and cleaned good and put back together using dielectric grease, then taped the connection so it would not come loose again. Problem solved.

Posted on Sep 15, 2008



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Well first thing I would check is the alternator, Make sure the alternator has 12V on the big wire and 12v on at least one of the wires in the plug in connector with the key off and 12 on at least one wire in the plug in connector with the key ON There are fuses in the circuit Check them and replace any bad ones. Here is the wiring diagram for the circuit
if this information is helpful please give me a good rating Thank You, Randy
If you need further help please contact me at [email protected]

Posted on Aug 17, 2008

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1 Answer

Radio going off and on..air conditioner going off and on..gauges flickering and won't start

It could be a faulty alternator. This would cause a battery drain since the alternator would not be recharging the battery and supplying operating voltage to the vehicle. Once the battery dropped to about 8 volts then the gauges, A/C, radio and other electronics would start acting crazy. Eventually the car would have shut down, but since you stopped at the post office, that didn't happen. With the battery being so low in charge, that would not allow the car to restart, as there would not be enough current to engage the starter properly. Check the battery voltage. If it seems ok (12-13 volts), try checking it again with someone trying to start the car. A normal battery will see some voltage drop, but a drained one will fall to almost zero with a starter load. Since you have gauges and not warning lights, a discharging battery may have gone unnoticed. If you determine the alternator is bad, be sure to have the battery charged, or if necessary, replaced before using the new alternator. A low battery can cause a new alternator to fail and most alternator warranties will not cover this type of failure.

Sep 05, 2014 | Cars & Trucks

1 Answer

What makes the car start and run but gauges go off and key light comes on

The first part is magic, (EFI system and good engine)
gauges go off can be a bad fuse or loose fuse to cluster.
when any Gas engine stalls. the RPM drops to 0
the EFI sees that and goes to key on, not started self test.
this is covered in the operator guide.
key light comes on KEY LIGHT, HUMMMMMMM
Let me look at the waring lamps, there are many.
one light is engine overheat that is logo of a thermometer but looks
just like a key.
is this a engine stall post
or engine runs perfect all the time , but only my dash acts funny
you didnt say?

key lamp?
immoblilzer (big trouble there)

a stall is anytime engine RPM drops to zero. called a STALL.
if your cars engine stalls, post that way, the lamps are all normal
on at any stall, on any car.
at a stall , rpm goes to zero and MPH drops to zero as you coast to a stop , stalled. that is all normal for any stall.

if engine stalls.
that is complex.
here is list.
  1. lost 12vdc power to EFI system. (battery died, fuse blown)
  2. never gave your car the 60,000 mile tune up, see opr, guide.
  3. bad fuel.
  4. overheated the engine.
  5. engine oil gone, never ever checked at each fill up.
  6. other more complex EFI system parts failures, ASK.

May 03, 2014 | 2002 Jeep Grand Cherokee

1 Answer

My check gauges light is on, oil hands goes over to zero, moves up, light goes off, when it drops back to zero, gauge light comes back on.

Well the warning light is supposed to come on if any of the gauges display a dangerous condition, such as no oil pressure.
You may have a faulty sending unit for the gauge, or a wiring problem, or the engine may actually be loosing oil pressure when the gauge drops.
You could replace the sending unit as a test, or have someone check the oil pressure with a mechanical gauge.

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If the valve lifters are quiet you most likely have oil pressure even with gauge showing "0".Sounds like the oil pressure switch going bad.I would try that first.

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2003 monte carlo voltage gauge drops to zero, battery light comes

G'day mate there is also a main fuse with high amp fuses located near battery check each fuses by pulling out and checking for condition ie loose wobbly also weird as it may seem i have found a number of vehicles in which the ants have made a nest in the fuse box/s, dont know why just found it od , what they do is ends up with tracks to earth from nest for positive curciut, try that.

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