My brake lights won't work but my turn signal and back up lights all work. Hazard lights dont work either. Its not the fuse but I don't know what else to check. Can someone please tell me what to do. Its a 91 Jeep cherokee by the way.

 

i believe it is on the pass side kick panel.
you also may have a switch issue.

 

I would check the BOO (Brake On Off) switch its connected to the pedal shaft if you look about 6"s above where you step on the pedal you should see it

 

I had the same problem....I just drained my tailights that were half full of H20
and they worked...ahhh ahahha its true. good luck