Why dosnt my car charge the battery when driving?

Question:
i got the battery checked i had it replaced i brought the alternator to auto zone and its fine, the car dosnt carge the battery when i drive it, just the car sitting there it stayes charged, it loses moreand more charge when i drive it WTFF?

Answers:

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it sounds like you may have an issue with the grounding system of your car. there are two options, 1. disconnect the ground wire from your battery. then unbolt it from the body and clean both contacts up with some sand paper and reconnect everything. or, 2. you can upgrade these wires on your own by purchasing some 4 gage wire from a car audio store and some connectors. this is most frequently done on cars with sound systems. the wires that you will want to upgrade are the "Big Three": 1) alternator positive to battery positive, 2) battery negative to chassis, and 3) engine ground to chassis
be sure to leave the factory wiring in place, as it will serve as a backup in case of problems with your new wiring.
here is a website that will be more informative and detailed for you.
http://www.the12volt.com/installbay/foru...

2000 Dodge Neon, Left front tire does not respond to steering wheel?

just casue they say its "ok" dosent mean squat. Ive bought a brand new starter from them and it was bad. get a new altnator

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THe only reason that this would happen is because the alternator is bad. That is what charges your battery. Autozone doesnt know that they are talking about man. Just replace the alternator.

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Sounds like a deep electical problem going on. You may need to take it the machanic to check it with a computer.

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Don't know what year but you may want to check the connections on the cables to make sure both ends are tight and also check the tensioner on the serpentine as if it is weak it will loosen the belt and cause the alternator to slow down.

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You might have the alternator checked at a second source, I really place my money on the regulator. Once again most regulators are in the alternator but if you have an older vehicle it may be outside the alternaotr and this would then be the problem

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You may have a loose belt if you said it's ok at idle, it's only when you drive it's the problem. The easy way to check the alternator is to disconnect the battery cable while it's running to see if it stays running. The alternator would be doing what it's supposed to do, if not it's bad. If you have a bad cable or connection going to the battery could cause it also. Good luck

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If you've already had the battery and alternator checked and they're good, more than likely your ground wire is loose or broken. You need to make sure the alternator belt is tight, and if it is, then check the following.

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You have two battery posts, one of them has another wire attached, follow this wire to the starter, (located on the underside of the engine) the wire should be tight and unbroken, if it's loose you must tighten the nut holding it in place. This should fix the problem.

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still several possibilities. something as simple as a blown fuse to a corroded or broken wire, or even a loose belt. later model cars use a lot of juice from the battery to keep all the electronics working properly. at idle, there is less use because of less rpm and less computer usage because most idle plans don't require constant changes from the computer as they do while driving the car. also, if its an automatic, late models mostly use electronics to make the tranny shift. ya might have a mechanic take a look rather than pay a tow bill when it dies from a dead battery. good luck with it.

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You may need a new regulator, to allow current to charge your system.

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check that the belt is tight. try cleaning the battery terminals.

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did you check the belt?,the belt could be worn out and slipping and not charging the battery.

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inner and outer voltage regulators.if either of them are bad, the battery won't charge

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