I am swapping the fender/taillight/turnsignals out on my dad's 2011 Ultra Limited to 2010-12 Street Glide/Road Glide Custom equipment. Ditching that big ugly tail light and bumper light for the smooth look. I have all the wiring figured out except what the orange/white wire on the FLTRX harness is for. I can put power to it with the power probe and it does nothing. I am having to do change the connector on the chassis end of the taillight harness so it will plug into his bike. Any info on this would be great. Also can someone double check my work on what the rest do?

Black-Ground
Brown-Right turn
Violet-Left Turn
Red/yellow-Brake
Blue-Run/marker
Orange/White-???????