this may be an odd question, but does anyone know where the HMSL (high mount stop light) (3rd brake light) wire ends up on a 2012 XF NA? I am one hundred 100% certain it ends in one of the wire harnesses in the rear junction box, I just can't figure out which one it is. I looked at a wiring diagram online which says it's a yellow-grey wire, but I guess I'm color blind because I couldn't find it anywhere or the wiring diagram is not applicable for my car.

Or, is there anyway to get to the brake wire on the other end, where it attaches to the light? Thinking I would have to remove the rear shelf, which seems like a PITA

Any insight would be much appreciated. Thanks as always!!

 

At a minimum, does anyone know where I can obtain a diagram for the rear junction box that includes the wire harnesses?