Has anyone out there ever figured out how to do this mod? I was thinking of buying a new set of headlight harnesses and adding a relay for low and high and then use a diode between them. The older trucks don't come from the factory with headlight relays so it makes everything difficult. I would leave the stock wires in place just incase the mod didn't work so that way it would be a really quick change back to stock.

Any ideas any one?