Brake Light Issue - 2013 T800

[Hermjeji]

2013 T800, on the trailer, I've got a set of dedicated brake lights, and then a turn/clearance and brake light.

The left side turn/clearance and brake light doesnt work. And i'm not getting power to the fuse either. Any tips on how I can further diagnose this. The truck lights all work properly. I've circled in red the fuse that doesn't get any power, and in green the fuse that are related and do work.
Checked the relays, they are not the problem. WHy would the power to just that one fuse not be coming?