Iv got an 06 Taco SR5, Bought the truck last year used. Never towed anything behind it till last month. The brake lights wouldn't work but everything else does. The trailer is a 4 pin.
Everything works like usual except the brake lights don't work. I can't figure out the problem. The running lights come on, and all the signals work, but when I push the brakes, the trailer lights don't light up. My dad has wired F18's and he has no clue wtf is going on?!? LoL. He's convinced I need to buy this wiring harness from etrailer in order for it to work.
**Note** The trailer lights work fine on his 2010 F150.