My 4x4 quit working and I need some advice. It's a 2003 f250 super duty 6.0. I have no power to the switch, no power to transfer case and power to all fuses except fuse 31 and no 4x4 lights on dash either not even when first starting truck up. I'm Thinking It Could Be the gem or a broken wire somewhere. Any ideas or suggestions would be greatly appreciated. Oh I already changed fuses under hood and they are getting power.