Over the course of time, I've always overlooked the fact my 3rd brake light has never worked. I even pulled the assembly out, looked in the hole with the sunroof pulled back and there seems to be a harness missing between the assembly and where ever it's supposed to connect in the headliner.

Any ideas of where I can get ahold of the harness?

 

Are you talking about this harness? I linked it down below.

https://www.qualitymoparparts.com/oe...7aa?origin=pla