Brake Lights Not Working? Help!

[DaedHead8]

The other night after work I decided to check all my lights and I found that none of the brake lights are working. I doubt it's the bulbs and I checked the fuse, so what else could it be? I've read on here about a switch underneath the brake pedal, how will I know if this is bad? If it's not the switch, than it is probably a short. Where is a short most likely to occur?

Also, I modified the brake lights over a year ago so the third light shows up while braking, is it possible that this is where the short is occurring? I hope not because I like the way it looks with all three lights lighting up.

[1996 328ti]

A short would cause a fuse to blow.
An open would cause the bulbs not to work.
I would fiddle with the brake pedal while someone watches for light.

[zygasbmw]

remowe socket frow pedal switch,and short the contact with another wire.short the socket contact,ignition is on,and check the lamps,if works then bad switch.