I know there have been posts similar to this, but each case is different
I put my 72 s/b into v force about a week ago to fix a leaking brake line in the cabin
Great job but now my brake lights arent working
Reading through a few other posts i figured out as much as i could byself.
I checked fuses and globes, all seems fine.
I bypassed the brake light switch and the brakes still arent coming on. Im not sure where to go from here?

there are 2 break sensers under and on the master cylender attatched to the booster start there good luck

if you join the 2 wires on the master cyclinder together and turn the ignition on the lights should light up if not the globes are blown if you have a 2 switch master cyclinder join all 4 wires together

If they do light up then the switch or switches on the master cyclinder is buggered

or take it back to V Force to get it right