Question about 2002 Jeep Liberty

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Battery/Electrical System Problem.

After fully charging the battery, when running the car battery light comes on.  Then, in several miles other assorted lights come on ( as the lights grow dimmer and dimmer) - finally ending up with nothing.  After fully charging the batter again, same sequence.  Help!  Alternator!

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Check the alt might not be charging the battery

Posted on Dec 30, 2008

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Can my car hold a charge to get it to a dealership if it is dead due to a bad alternator?


if you have a fully charge the battery and you have had the battery load tested to ensure that it is a good battery then a fully charged battery will run an engine for several hours providing that there are no other power draws on the system. That means -no big radio ( amplifiers ,cds, blue tooth)draws -no lights -transmitters --cigarette lighters ---power window usage Especially no repeated starting of the engine

Aug 20, 2014 | Cars & Trucks

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The battery is fully charged head light come on by the dash lights will not and the engine will noy turn over


If your engine won't turn over, there are a number of problems that could be the cause, This dead battery will still hold a full charge if you recharge it. Another thing that can cause your car to not turn over are the cables that connect the battery to the starter. This is the thickest cable in your car's electrical system, and carries the most current. make sure the cables are tight and clean for a good connection. If the battery is fully charged, just drive it around. for about 45 minutes, then see if it starts good. are you sure the alternator and or battery is good! use a test light, with car off at the battery post should be at least 12.6 or better at battery. if alternator is ok, less than 12.4 battery is failing, when running, at battery voltage should be at least 13.8 to 14.2 or better if alternator is charging. Try this, In the morning after letting it sit all night test it at battery to see if it is ok! or try a new battery. this one may be going bad. Hope this helps, Good-Day!

Jul 26, 2014 | 1996 Chevrolet Monte Carlo

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Electrical system drains battery when vehicle not in use


Normal for a 3 year old battery. it has internal resistance that discharges it self.


Disconnecting the battery will not help.

A way to see if vehicle is causing the discharge,but it will dump the radio and clock settings....take off one of the battery terminals and put a test light (12 V.) between the terminal on the battery and the cable end. If the test light comes on,there is something ON in the car.

If the computer memory is dumped due to low voltage,the car has to "re learn" all of it's setting and will usually not idle well at all!

Please have the battery load tested after it has been fully charged.

Dec 25, 2012 | 1998 Oldsmobile Bravada

1 Answer

05 Chrysler Pacifica engine bucking , engine light comes on, battery light comes on. But battery is fully charged and alternator is working. When the battery comes out, it seems like the computer re


The Battery CCA Rating is to turn over the starter

CCA--Cold Cranking Amps
That is at zero degrees
Total cranking amps is at 32 degrees

The car runs off the alternator
It puts out over 14 volts

The 12 volt battery is 6 cells @1.2 v each = 13.2 v

You need 12.6 volts to test a car or you charge it first

You need over 13 volts to charge a battery,thus the alternator

The only other job the battery has is a stabilizer in the electrical
circuit

So you need to have the charging system diagnosed as the
various light you have on should be off when engine first starts

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1 Answer

I just buought a 98 Volvo S70 T5, the car sat for abit, to the point were It had to jump it. to start. ran great for the next 2 hours off and on mybe 7 diffrent starts but it never running for more then...


It could be a number of things:
  • Bad connection or corrosion on battery cables
  • Dead cell in the battery would prevent it from charging fully
  • Bad or worn drive belt would slip, preventing the alternator from fully charging the battery
  • Bad alternator
If the car will run at idle with all accessories turned on, the alternator is good and you should concentrate on the battery and battery cables. If the car won't idle, then the drive belt and/or alternator could be the issue. If the car starts everytime when it's cold and only gives you a problem starting when the engine is hot, the starter could be the issue. A bad starter will often work when it's cold (after sitting a few hours or overnight). When a bad starter gets hot, it takes more and more power to get it to turn over.
Overall, I'd have the electrical system checked out. Most chain auto parts stores (Autozone, Advance Auto) will do a complimentary electrical test for you.

Jul 22, 2011 | 1998 Volvo S70

1 Answer

Battery warning light was on this morning , and for several miles altrnated between being on and off. After several miles it got dimmer and finally turned off. Car seemed to run all right though.


Replace the battery. The batter is on it's last leg and is about to die. The reason the light went off is because as you drive, the alternator provides charge to the battery. So the further you go, the more charged the battery becomes. That said, if the Battery warning light was on when you started the car, and you had not left any interior lights on over night, then the battery is losing charge rapidly or is not holding a charge.

May 16, 2011 | 1999 Honda Civic

2 Answers

My battery light comes on dim at idle and turns off when i rev the engine


This is indication of the battery being in good shape and almost fully charged. The light on the dashboard is an indication that your dynamo is producing sufficient current, which increases when you rev up and the vehicle is no longer drawing any charge from the battery. On idling, dynamo produces less current, thus to keep the electrical parts running it draws a small amount of charge from the battery thus lighting the indicator is very dim. Do not worry. Everything is OK with your cars engine & battery...........sodeep

Sep 25, 2009 | 1991 Honda Civic

1 Answer

Battery Light is On


The alternator is not charging the battery. Could be alternator, voltage regulator (which is usually in the alternator) , dirty/loose connections. First I would inspect all relevant electrical connections, clean & tighten. If no change -- replace alternator.

But be sure to fully charge the battery before you run the new alternator (follow alternator installation instructions).

May 13, 2009 | 2000 Volvo S70

1 Answer

Not charging enough to keep battery charged and no dash gauges


The battery charger circuit has failed. If it has a fuse, see if its OK. This input comes from the dynamo, but if your headlights work, then the dynamo is OK. If you are not familiar with the electrical system like checking the leads with a multimeter then best to have a technician(vehicle electrical technician) to check it and if the fuse is OK then the rectifier may require replacement................sodeep

May 09, 2009 | Ford F-150 Cars & Trucks

1 Answer

Several secondary electrical systems not working -- 1998 CLK


They can check the battery and the charging system for starters. Fully charged battery,clean cables. then do a load test on the battery. If it didn't pass the test replace it and check the charging system.
Charging system easy to check , Put voltmeter on battery terminals and monitor vehicle's voltage with and wthout accessories on. should be between 13.5 to 14.5v . Before condemning alternator inspect wiring behind alternator ...if corroded replace then retest.
If voltage is with range then the problem is in the power distribution compartment/ relay, or either is a ground all those items share.

Aug 13, 2008 | 1998 Mercedes-Benz CLK

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