on the back side of the generator (internal regulator) is a ground-connection. I could swear there was never a cable conencted. But since my generator is failing now I winder whether there should be a cable? Is this connected in your vehicles? Whereto engine or chassis? Patrick
Hello Patrick. I'm not an expert but I know a thing or two about automotive and motorcycle electrical systems. Personally, I've never seen a ground wire installed on an automotive alternator, internal or external regulated. The mechanical connections between the installed-alternator housing and the engine block, cylinder head, mounting brackets and adjustment bracket will provide excellent ground current paths... Providing those connections are free of corrosion, paint, non-conductive surface treatments (i.e., anodize), etc. I always sand the mating surfaces prior to installing a new alternator, just to make sure. I hope this helps.
My 2 cents: IF you are using a hi-amp alternator it is smart to run a ground from the case to the frame/battery/block. Think about it. You will need a 6 GA positive wire for 100 amp load. Why depend on the little original ground? The 100 amps is making a loop!
