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Love you Scotty almost as much as my 2015 Avalon, which is accumulating corrosion on my positive battery terminal. Dealership already soaked me f

  

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Overcharging battery how can fix it..dealship no good 

 

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IMHO, you should have your alternator tested. That's most obvious source of the problem, a voltage regulation problem with the alternator. Unless you have an extended warranty, the dealership's service department won't be much help. 

Find a good diagnostic mechanic, and have them test power/ground/voltage on the alternator.

 


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