Question about 1997 Jeep Cherokee Country

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Alternator not charging

I have tested both the alternator and the battery in vehicle and out as well and every couple of days the truck needs whether its going to charge or not it never stays charging for more than 3 days

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  • yadayada
    yadayada May 11, 2010

    the truck needs what? read your post.

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  • 160 Answers

It needs a new batt start it up then remove the neg side of the batt if it stays running alt is fine if not it has gone bad

Posted on Dec 10, 2008

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Posted on Jan 02, 2017

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1 Answer

2003 Ford Expedition not charging


Probe it from the alternator all the way to the battery. Find the voltage drop or open circuit.

Jun 18, 2015 | 2003 Ford Expedition

2 Answers

My car needing a jump threw out the day


Ok I would have the battery tested. While testing battery make sure all connections are clean and tight on the battery terminals. If battery checks out to be good. Test the charging system, alternator. If alternator tests good make sure you belts are not slipping or worn and stretched out as this could cause a an inconsistent charge. While doing the battery test if posible do a draw test to see if anything is during current all the time as this could be draining or weakening the battery.

Apr 13, 2015 | 2000 Chevrolet Blazer

1 Answer

I have a 1997 mercury mystique. Battery fully charged, turn the key, absolutely nothing. In fact no power to anything, no interior lights, nothing. Battery is brand new


Its seems voltage regulator issue.Get the vehicles charging system inspected.

To troubleshoot these issue i suggest you few helpful links with solutions:---Click the link below:----

How to inspect Vehicles Alternator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-inspect-vehicles-alternator.html

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How to Test Vehicles Alternator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-test-vehicles-alternator.html

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How to Service Vehicles Alternator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-service-vehicles-alternator.html

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How to Replace Alternator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-alternator.html

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How to monitor Vehicles charging system?

http://repairhelpcenter.blogspot.com/2011/11/how-to-monitor-vehicles-charging-system.html

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Car Alternator making noise?

http://repairhelpcenter.blogspot.com/2011/11/car-alternator-making-noise.html


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Car Alternator Working Intermittently?

http://repairhelpcenter.blogspot.com/2011/12/car-alternator-working-intermittently.html

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Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.


To confirm the problem, the basic troubleshooting is required.



From start to end troubleshooting these problems I suggest you to check the help link below and follow its procedure: -----


Mostly all types of car no start problems are discussed here with solutions:---

CAR NO START: ENGINE NOT TURNING OVER:

http://alltypesofpartsreplacing.blogspot.com/2012/11/car-no-start-engine-not-turning-over.html

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These will help.

Thanks.

Dec 10, 2012 | 1997 Mercury Mystique

1 Answer

2nd newly rebuilt alternator burning out.


Due to the nature of the battery technology used with vehicles the alternator is mostly incapable of charging the battery. The car alternator is designed to keep a fully charged battery fully charged and to provide all the power for the car equipment.

The alternator charge rate is regulated by a voltage regulator. Because the alternator output is connected to the battery, the alternator and battery voltage will be the same and the voltage regulator monitors that voltage.

The lower the battery voltage the more output the alternator will produce in order to correct the situation but because a lead acid battery has a high internal resistance to accepting a charge the terminal voltage will quickly rise to the alternator regulated voltage and fool the alternator into thinking the battery is fully charged when the output will drop to the order of just a couple of amps.

Switch on the headlights or a similar load that will lower the battery voltage and the alternator will increase it's output again - but only by the amount of current the headlamps or other load is consuming.
It matters not what the alternator rated maximum output is, it is designed to provide only the necessary current and no more.

The only time an alternator should ever need to produce maximum output is when on a dedicated testbed and then only for a short duration to avoid damaging the unit. Testing the current output on a modern vehicle is not recommended except for the regulated voltage testing and a rule-of-thumb output test where all equipment is switched on and the engine speed raised while the battery voltage is monitored.

Most modern alternators use an internal voltage regulator but a few systems use a separate voltage regulator. No alternator rebuild would be complete without a regulator test and probably a new or replacement regulator, which is where the majority of charging system problems are, or the brush gear.
Assuming the wiring is ok, no alternator should suffer any harm if the voltage regulator and auxilliary diodes (if fitted) are in good order though fitting a defective or a discharged battery can cause it to overheat and be damaged.

The alternator usually just about stops producing an output when the battery voltage is in the region of 14.5/14.8 volts.
Your description indicates the voltage regulator is not working correctly - unless 40 amps was being consumed by the car equipment the alternator should not have been producing 40 amps.. I suggest you also have your battery tested

May 12, 2017 | 1988 Acura Legend

1 Answer

Put new battery in my fiat brava but it still goes flat after a couple of days


it takes your battery to start your vehicle, once started the electrical power is genereated by your alternator, if your altnernator is bad or going bad the car then relies on the battery for the electrical power, the battery will go down or dead because it cannot sustain a charge.
it sounds like you need to test your alternator and maybe replace it.

Aug 11, 2010 | Fiat 124 Cars & Trucks

1 Answer

Car died on the freeway and cant get it to start again. Its been a couple of days when I stick the key in it makes a clicking sound and now my lights wont even turn on


You first have to make sure the alternator has not failed. Try to fully charge the battery and see if the truck will start. If it starts, remove the battery cables making sure they don't touch the vehicle. If the truck shuts off, the alternator has failed. If it remains running, turn on the head lights along with other accessories. If it shuts off, the alternator still may be weak and needs replacing. Lastly, have the battery load tested to ensure that it still holds a proper charge.

Apr 23, 2010 | 1999 Isuzu Rodeo

3 Answers

Battery wont stay charged, alternator problem?


I suggest that you take the car to an autoparts store and have them check the alternator output. That will tell whether the alternator is putting out sufficient voltage to keep the battery charged or not. Most parts stores will check the alternator for free. Hope this helped and best wishes.

Sep 15, 2009 | 2001 Volkswagen Beetle

3 Answers

One year old battery kept dying. It tested bad and


There is some things to check....

(1) Is your alternator charging? take your vehicle to Advanced Autos, Napa or someone like that and have them test your alternator.
(2) Is there something in the vehicle causing excessive drain on the battery when the motor is not running... like is the interior light may be on or something to that affect.
(3) Are you doing enough driving to recharge your battery? short stops and starts is not good for a battery as you may rob more energy from the battery then you are putting back in.
Sounds like something is draining your battery, something must be left on in the vehicle, Advanced Autos or Napa should be able to tell if something is draining your battery when the vehicle is off.

Aug 28, 2009 | 1988 Chevrolet Blazer

1 Answer

Car battery problem


The alternator test will likely indicate a charging problem from the alternator that is not keeping the battery charged up.
Regardless of the alternator test, it would be best to do an electrical draw test to determine whether there is an excess drain on the battery. This can be done with an ammeter between the positive terminal and the positive battery post. This test is done with key off, all accessories off, no lights on, etc. There will be a small draw on the battery in all newer vehicles, but it should be in the order of up to 50 milliamps. If you are getting more than 200 milliamps of current draw then there is a problem with an electrical system that will drain the battery over a period of days or weeks. Once you know this is true, the electrical systems can be methodically tested.

Jan 19, 2009 | 1995 Chevrolet Lumina

2 Answers

How to test installed alternator on nissan pathfinder 1994?


Start vehicle and with vehicle running there should be at least 14 volts when tested at battery leads. If you don't have a volt meter may I suggest taking this vehicle to an AUTO-ZONE and they will test for FREE. They will test the entire charging system including battery and alternator and starter. Good Luck

Dec 30, 2008 | 1995 Nissan Pathfinder

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