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Alternator checked out good...by a couple young kids at oriellys so maybe I need to go somewhere else but anyway it checked out good and the battery I’d brand new....so my volts go from 14.5 to 11.7 while I’m driving on the highway for a minute or two at least 3 to 4 time on my way to work which is 70miles one way...anyo e got any ideas?  I disconnected my grid heater and it seems like it does it less but it still does it...



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