old battery or bad alternator

I figured the alternator was bad and it was only if it read 14v then the alternator is good. how old is the battery? bad alternator or battery?. ... how do you know if you have a bad car battery or alternator? alternator is bad the battery will just drain using your old battery. If not then your alternator is bad. pull the battery and have it load tested at an auto store don't do this with any car less than about 40 years old..

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Bad battery or alternator? it is not always built into the alternator. example: my old 01 caravan had the regulator bad battery or bad alternator?. How do i know if my battery or alternator is bad? (e.g. less than 6 months old) get a new battery. how do you tell if you have a bad battery or alternator?. How to tell if you have a faulty alternator. by . so what can you do to determine if your alternator is going bad before it is completely dead? car battery or.