No Aux power in 7 pin harness

2005 trd sport (with tow package), trailer brake controller installed

I have no power on the 12v pin of my harness. (upper right pin when looking at it) What do i have to do to get power there? Ive checked every fuse that might have to do with towing, cant figure it out.

I have a snowmobile trailer with interior lights, gotta get them working!

 

ignition has to be on for 12v to be seen at that pin.

 

True, truck was running.....

 

mmm the ground in the 7 pin is good because I can use it to test other wires (taillight, blinker, etc.)

 

Checked em, they all seem good, but i havent been able to know EXACTLY which fuse delivers the power to that pin. I check all fuses related to towing though.

My other thought i just had is that i had a corroded part of the wiring harness that i fixed last year, but maybe that's going bad again or i didnt do something right. Ill have to do more poking around back there...

 

Yep this is where the wiring corroded so bad that there was one wire completely disconnected. I noticed this right after i bought the truck and fixed it by running a wire around the harness and making a direct connection on that wire. Maybe something is off there.