1972 Plymouth scamp charging and grounding issue

i had this issue in my scamp, given it was with a slant, but i replaced the whole charging system and it still had the issue. i found that some of the older ground wires while connected had some corrosion in the middle of the wires (found it after i replaced them and cut them in half to check) short story long i found it easiest to replace all the ground wires at the same time just to be safe. fixed the problem right up. the wires may look fine on the outside but have corrosion inside, something to keep in mind.