OK, this is the deal. Car has been fine and running fine. Has recent new battery. All the sudden (when it idles and drives) now the voltage seems to be pulsating up and down. I have not put a meter on it, but it seems to be going from 10V to 14V is my guess.

Any of you have any ideas? Is it the over voltage relay bad, voltage regulator, alternatorm, battery? What do you think?

Car starts and runs fine. Battery is charging, etc.

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