Not so tough to do. Use a bit of string on the wire to the dome light. That will be what you use to pull the new wire back in to place. Use an "original" type harness. It will have what you need and should fit. Remember you have a 6 volt system so the "original" harness should have the right size wire in it. Use the diagram in the shop manual and take your time. "Natural" color is sorta tan, not white and not yellow. Enjoy the adventure and get an "ohm" meter. It will be your best friend. Turn on circuits one at a time. Try using a lamp battery for testing. It will provide 6 volts but not so much current that you will burn anything up. Get new grommets for the fire wall. The old ones will be too hard to work with. Only the fuel gauge is delicate and you will find those wires easily enough. Let us know how it works.
