battery guage inconsistant

1BAD9D4

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just as the title says my battery guage goes all over the place. it reads good when im in park but in any other gear it lowers tremendously. when i accelerate however the batter guage will go up. however when i get on it i get low battery signal. what could be the cause of something like this? ive replaced both the battery and terminals and still not workin right. shouldnt a battery guage be reading the same thing at a constant?
 

CC'S95GT

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Sounds like the voltage regulator inside of the alt is going out.
Have you put a voltmeter on the alt/battery with the engine running?
If no: Take the alt and have it tested.
 

ivan12

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Take it somewhere other than Autozone, their machines suck even the employees will admit to it.
 

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