No 12v Power at Hitch 7 Pin

I have a 2004 Tundra. I am trying to power my camper and realized I don't have aux power to my hitch receiver plug in (the top black wire). I tested the other pins and they all work, the ground works. The prior owner installed an aftermarket trailer brake controller, and I'm wondering if the aux power was diverted to the controller.

Any suggestions on where I should look to fix this/where the aux wire routes through? The 30 amp fuse under the hood is good.

Thanks

 

https://www.tundras.com/threads/ultimate-tundra-wiring-diagrams-collection.81448/

 

Figured it out! There is a separate small fuse box for the trailer hitch underneath the hood near the main fuse box.