Trying to figure out the wiring for the glow plugs on a Farmall 706. The wire in question is the wire feeding the 12 volts to the push button. It seems the wire leading there which I think was red has another red wire spliced into it leading back into the dash with a connector on the end, but not hooked to anything. I think I saw a glow plug wiring harness online somewhere and it show the same deal - a red wire spliced into the red wire going to the push button, with the spliced wire going back toward the fuel tank but not hooked to anything. Can anyone tell me what is going on with the spliced-in wire? Thanks.