Lots of great help on here, thanks to everyone who shares their information!
I just got my D3 unit Installed in my 2008 FORD F-350 and everything is working AWESOME, but they cannot find the illumination wire to save their lives. They are buddies of mine and I am just trying to help, so if you guys have a better answer to this question, like color of wire, cause one thing for sure is it was not in the wire harness. Any info will be appreciated.