I just put in a new alternator and my battery will not charge

Check all battery cable connections, including where (negative) attached to frame or engine block. Won't hurt to check wire connector to alternator as well and use voltmeter to check charging system out-put.

Even a new alternator and/or battery can be bad. You should have them load tested to verify they are working. You should also check the alt plug to make sure it is seated all the way or else it won't charge.

Sounds like you need to go to a different mechanic!! First things first. Your Battery is probably in a very low state of charge. This is why you can only drive a few minutes before it dies. A fully charged battery will give you much more driving time than 8 minutes. Now what you need to do is have the battery brought up to full charge. Once this is done then the charging system can be checked accurately. Keep in mind if the battery is in a low state of charge the alternator can be damaged because it has to work very hard to try to charge the battery. This may explain the frequent failure. If the charging system is ok then a key off draw test should be performed. You may be draining the battery when the vehicle is off due to a draw on the battery. Lastly if the quality of the alternator that is being put in your vehicle is substandard this may be a problem as well. All aftermarket parts are not equal!! If the alternator needs to be replaced then be sure to put a quality brand in your car. Make sure the battery is fully charged before doing so as not to damage a new part. Although charging system problems are fairly easy to diagnose the mechanic doing it must be fully trained in doing so or repeat failures are guaranteed. Hope this helps

well you need to check to see if it is charging if you get car started put a metre on battery see are you getting a charge if not i would go for the alternator

check alternator, could ther be a short some where?

Could be couple of things,
A bad battery not holding a charge, should be a little over 12 volts with engine off.
A bad alternator not charging, should put out between 14 to 15 volts with engine running.
If there is an advanced auto near you, take them there, they will check them for free.

Why do you feel it isn't charging. Are you going off of a voltage ereadiing? I ask because if it is reading 12 v at the battery , Do not run it very long. The lower the voltage the higher the amps. An Alternator will ocweheat and self destruct if it is working at its high limit for 15 minutes or so. A heavy charge iis normal for 30 seconds or so to make up for the starting drain. But, should show a gradual rise within seconds. An alternator is for battery charge maintenance only and should never be used to charge a dead battery. A dead battery can an will over tax the alternator for too long. A defective battery will do the same thing and it is usually why you have to change the alternator in the first place. So, If your battery is dead or extremely lpw, it should be charged with a charger Do not put a new or rebuilt Aly. sgainst a possible bad battery. It costs nothing to have your batt load tested by a auto parts store. Good Luck=Ned-.

SOUNDS LIKE U HAVE A DEFECTIVE ALTERNATOR.IT WAS CHARING WHEN IT LEFT THE SHOP SO THERE IS NO WIRING ISSUE.BAD ALTERNATOR

Time to switch to a low consumption car my friend
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