Headlight switch is grounding 12v to body

UPDATE: installed the ground cable and... what’do ya know! EVERYTHING WORKS! I also added a ground cable to the back of the rallye cluster and i can say that also helped the dash lights out, definitely not flickering like they had before.

Thanks for everyone’s help! You guys really are the best knowledge base around!

Such a simple thing to overlook!

THANKS AGAIN EVERYONE!