urgent help needed

my 93 chevy g20 has no brake lights i have turn sigs marker lights and 4 ways the fuses are good .

Do you have a trailer wire harness ?

yes i do its been on van for few mounths this first prob i had

i recently had no brake lights in my van
and a wire came off of thbe brake light switch down on the brake pedal
check down there and see if all ur wires are in good shape

wires are good i have tail lightsand  turn sigs  when i push brake peddle the wire from high mounted brake light gets power  als when i put 4 ways on and hit brake peddle it dosent over ride like it used to they keep flashing

bulbs is what u need

Check the flasher.

Checked everthing no luck had dealer lookat it fix would cost more then van did so i  sold van and bought a 97 chev c1500