I made my own, and where I couldn't match the factory colors I made notes of the changes in the wiring diagram of my service manual. Its not perfect, or quite as neat as one of the $650 harnesses, but it works, eliminates the fire hazard of the old cloth covered wires that in my case were bare in some places. Did it 1 wire at a time, and since I had previously converted the truck to 12v I was able to use slightly lighter guage wiring.(Doubling the voltage cuts the amperage by half!) Take your time, and if you do like I did-put some fuses in anthing other than the headlight circuits (that has a breaker attached to the switch). I also bypassed the ammeter and installed:rolleyes: a voltmeter. since I now have a fair amount of lights on the rack body, added a heater, and radio, and will be adding some other acc's too. Mike