No dash lights. Fuse box?

There is a way to jumper a failed rheostat and get full on illumination at all times but... for the 14 bucks invested in a new headlight switch at most any part store... why bother? In fact, the new replacement switches all include a ground wire attach point that you could use to your advantage. This ground wire wasn't part of 68 OEM electrical scheme but most will agree it should have been.