OK I see in the article that this particular stock tail light has 4 wires, mine only has 3. There is like a purple (ish) wire, a black w/ yellow wire, and a black with red wire. Any clues? The purple (ish) wire seems to be running to the back up light. Oh yeah, I'm color blind, so those colors I've listed are only approximate. The wires on the Rugged Ridge LED tail Light are Green, Red, and Black.