VW changed that wiring path by making it larger and more direct over the
years after yours. You saw for yourself why they deemed that necessary.
Too much voltage drop with various things turned on.

Adding a new #10 or #8 from the alternator to the starter motor post is
similar to what they did.

Mark

Michael A. Radtke wrote:
> Hello,
>
> Thank you all for your replies.
>
> I had already verified all of the ground paths and determined the
> voltage drop was in the positive wiring. With your help, I located the
> junction that I couldn't find. My car has no corrosion on any if the
> connections, but I still checked each current path across the junctions
> for any voltage drop. None was found. I determined that all of the
> loss in voltage was in the wires themselves. Since they are in great
> condition, I concluded that this is the way VW designed it.
>.............
>