1994 s-10 pick up

i check the fuse,but the brake lights wont work,i check the bulbs.is it the brake switch on the pedal.

Could be the brake switch on the upper side of the pedal. Check the harness in the very back around the frame, I think there could be a ground there, maybe.

Yea, I would check the switch. But also be sure you have the grounds down. There are actually two. One on the input side of the harness for the tail-lights, then one on the wires that run up to the harness itself. They're both held on with a self-tapping bolt on the inside of the frame

ya first thing id do is get a test light and go from there