Mattax has reached deeper into this than me. I just went to the basics, enough for me and my car. I just helped a bit. And maybe began this pro ammeter battle some years ago LOL. not because the ammeter could be the best or not, but simply because I found MOST of the ppl doesn't even know how the charging system works and how to read an ammeter.

about the diagram posted that I found, was from one of the alternators I todl you, a mids 80s replacement alt, sold under Beck-Arnley brand. I got it from Rockauto.

about those extra truck accesories and the isolation system... I'll have to learn too, LOL. Competition sound cars are on same deal.