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Notes on the failure. Review the above noted symptoms. In final failure mode, it charged at 16v pegged on the gauge until about noon each day,


Fry any bulbs? Fry any electronics? If you don't know how far above 16V it went, it might be time to start asking what max voltage the trucks components can handle.

When my alternator did the same thing, I parked it damn quickly despite the fact the low beams were working exceedingly well....

Paul