3rd gen tail lights not working

My tail lights do not work, though my brake lights and everything else does. The bulbs look good, the filaments all intact. All my fuses look good and there are no warning lights.

Installed a Curt trailer light wiring harness in the summer. After a couple months noticed there was an issue in which the brake lights would stay on. Unhooked it from the battery and everything was fine for a while. Last night someone notified me my tail lights weren't working. Unhooked the Curt harness completely from the taillights and the bulbs look fine. I've never had a bulb not work as long as the filament was good. I can't find an accurate fuse diagram but I checked every 10 amp under the dash and they are fine. I don't want to take it to the dealer because when they see I installed that harness they're gunna bend me over.

 

It's a 7.5amp fuse under the dash. Second one from the engine bay wall on the brake pedal side.

 

That was it! Thank you so much! I have no idea where I mislaid the cover that tells you these things

 

Here's a pic of a custom cover. At least you will have something.

 

Thank you! I'll save this in a few places so I never lose it