Bill....the switches are Delco-Remy (marked made in USA)..they have small fuses built-in...there are 2 contact strips and it is one of the strips that is burning in half, not the contact points.
Stuart....you explaination helps because when I ohmed the circut I was ohming the wiring and the headlight lamps all at the same time. I had continuity to ground as I expected I should. but I can see now that ..maybe..I am actually ohming a bad wire in the circut that is shorted to ground...hmmm??