70 up charging system upgrade question

When you cleaned up the bulkhead connections did you clean up and inspect the wire and terminal on both sides of the bulkhead? That's one way for a connect to be cleaned and reinserted and get a worse connect if the interior side is mucked up. A real pain to get at but corrosion doesn't care. And spraying cleaner from the engine side only helps where the blade slides in. Gotta check the rest of the connect. And it isn't easy. Course you can check for voltage drop before removing it. You can check for drop further along the wire where access is easier.