I got no dash lights when I got the truck so I looked and my original cluster the ribbon was mangled up and

My 81 f150

Original cluster with trashed ribbon
squished and everything so I got a new dash for 50 the top lights work like turn signals e brake light hi beam and fasten seat belts and the wire ribbon looks perfect but none of my gauge lights work I put my top bulbs where my gauges are and they don't work so I put them back and they work no fuses blown all my outside lights are good what could be the deal

 

Probably a bad ground.

 

But where how do I find it