Blowing Volt gaquge fuse!

did the internal reg mod on a 77 (Friend of son) and Screwed up!!!!

made the jumper conecting 2 & 3 and 1 & 5 but here is were I was stupi, also conected 4 & 6????????????? figured it out and disconnected 4 & 6 but am blowing volt gauge fuse, sometimes after awhile sometimes right away anyone got a clue what might have happened and where I need to start looking for this fix!!

Thanks

Also have converted to maxi fuse instead of the LInks