Power to solenoid, but not to starter. 1995 F-700/ 12v Cummins

I'm trying to get my dump truck (glorified pickup) running again as I'm running out of work with the big truck. I had put a brand new starter and starter solenoid (the one on the fire wall, not the starter) and it still isn't sending power to the starter, just making a click. Also, there is a small black wire that when I have it on the hot side of the solenoid it burns up, but only arcs like hell when its on the cold side of the solenoid. Very confusing. Any help that you guys can give me is greatly appreciated. Thank you

 

The wire burning up is a ground. Its going to its own terminal that's just a peg with a screw through it.