No power to the 12 V auxiliary seven pin trailer connecter

I recently purchased a new 16 foot enclosed trailer that has a Dome light inside, it’s never work connected to my 2008 Toyota tundra SR5 with factory towing package. I recently connected it to my friends at F250 and the light work after looking into it more I found no power coming to the black 12 V auxiliary power cable on the seven pin connector. Any suggestions

 

Is it maybe hooked on the ignition power? Have you checked the light with the truck running?

 

Yes I have, also all of the other pins work fine including the trailer brakes

 

I think it may be a fuse issue but I can not find the correct fuse.

 

Under the instrument panel #22
Trailer lights?

Just a guess maybe this will help lead ya the right direction

https://imgvehicle.com/toyota/tundra-ii/fuse-box

 

I check all The fuses that are labelled tow and I found nothing blown

 

Welcome from LA (Lower Alabama)! You might want to check this thread for electrical diagrams. This may help you find the issue.

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

 

Welcome from Alaska, good luck with your problem. You are sure to find your answer here on this site somewhere.

 

Welcome!