When I test the battery I get 12.6v when I start it and check again it’s the same exact reading it makes no difference whether I run the rpm up nothing changes so to me it seems it’s not getting anything as far as any charge. Alternator is an ac delco remanufactered and it is the second one I have tried so it’s new , the voltage regulator is new as well. I have checked all my grounds and they test good. The wiring harness is all new as well . What else can I tell you that may help ? I am good with basic electrical but far from being an expert for sure .
