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Why is it my car not holding charge battery new alternator new run for a day or two and dies out

New alternator and battery

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Faulty new alternator or wiring to battery is causing too much resistance to the battery to give it enough charge to re-charge it. Take the car to Autozone or Orielys and get them to test both the battery and alternator for free. If both pass, then it's most likely the cables from the battery/alternator need to be checked.

Posted on Nov 22, 2014

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Posted on Jan 02, 2017

fastboyz
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SOURCE: 1999 ford escort zx2 alternator works brand new battery but battery isnt charging !

you will have to check the voltage whith the engine running .should be 13.6 or better

Posted on Sep 25, 2008

Loringh
  • 185 Answers

SOURCE: 1999 ford escort zx2 alternator works brand new battery but battery isnt charging !

Stecorbett:

May I suggest that you drive your car to one of the major auto stores and they can and will check your alternator for you to make sure it is good/bad.These places like AutoZone do this all the time. They do not charge for the check out. (Of course they are hoping that if you need a part you will buy it from them.

One other suggestion. If you do need a new alternator, get a rebuilt one. It is cheaper and most always comes with a warranty.

Hope this helps Good luck Loringh PS please take a moment to give me a rating


Posted on Nov 09, 2008

JustJeeps
  • 74 Answers

SOURCE: Car won't stay running.

alternator does not hold a charge it simply charges the battery by unhooking the battery you are taking all voltage from computer and car will not run the proper way to test your alternator is use a multimeter and check voltage at battery while car is running if you have 13-14 volts it should be fine.

Posted on Nov 18, 2008

  • 17 Answers

SOURCE: new battery and alternator. Battery still won't hold charge

Check all your fuses if you had a system failure it could have blown a fuse. I am not sure on your vehicle where the fuse is in the car or under the hood it could also have a relay. You can check your alternator by checking the voltage at the back of the alternator where the big wire bolts on. You should have 14+ volts at the alternator.

Posted on May 24, 2009

  • 35 Answers

SOURCE: NEW ALTERNATOR, NEW BATTERY, CAR still dies and wont start

Check the main power fuse that goes to the alternator output. if the alternator went out it could have burnt this fuse also.

Posted on Jun 26, 2009

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Maybe it wasn't running long enough to charge up the battery?
Stop trying to jump it, when you are having problems with it dying, take the battery off and have it charged. And/or buy a $20 voltmeter to see what the battery shows. If it says less than 12 volts, it is discharged, and needs charging. A good battery that is not run down should have at least 12.5 volts. A new battery that is charged should have very close to 13 volts, maybe 12.8 volts.
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