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It’s from 2011 so don’t you think that it’s the stator?
I think I have done all the tests that I could, so from here, it’s the best guess witch one is the problem, and don’t you think there is a bigger chance that it’s the stator?
1.) Possible short circuit in the wiring. Small enough to drain the power the alternator is producing or located in a location that wouldn't blow a fuse.
2.) Too much power draw in the system (usually a result of aftermarket components such as a new headlight or ignition coils)
3.) Bad battery. Low internal resistance on a bad battery will cause it to use up power from the alternator.