Bought my truck used . 2006 2500 5.9 . Was sold " cab and classy. I bouught it with a bed on it and they put the gawd awful mega cab tail lights on it and cut off the factory harness ends . Anyone know the color coding for the correct tail lights and connectors? Harness on new tail lights are red, yellow , black, white and Blue but those colors arent in the wiring from the bed .

 

Try a junkyard truck and get the wires your missing. hopefully colors will line up. Other than that multi meter and a friend and alot of time