Why don't my '96 BMW 317ti brake lights don't work anymore?

Question

I had brake pads installed when leaving the shop someone following told me I had no brake lights. The tail, signal, backing, and hazards all work fine. I checked all the bulbs and fuses which were in working condition. I changed them all anyway just as an extra precaution. Does anyone know if somehow changing the pads could affect the brake lights through maybe a sensor that is not connected in the wheels somehow or any other reasons why the brake lights aren't working?

Answer 1

Brake pedal switch is broken, or unplugged.

It's realy hard to get to. WAYYY up under the dash.......
Or blown fuse.....