Brake light harness from the cab interior to the 3rd brake light,  This kit provides four wires,  1 wire for Amber Chase lights(Yellow), 1 wire for Ground (Black), One wire  for reverse / Cargo Light ( White), and one one to bring the running light circuit (Blue).   For use with Non-Raptor vehicles who do not have a running light to the rear of the cab.   Super Duty,  Chevy,  Ram, Toyota etc. 
Includes LED kit with resister and diode if the light housiong you purchase does not already come with one.