Brake light problem

I have a 91 BMW 318is and the brake lights are always on. I checked the switch under the pedal and its not stuck and seems to be functioning. I need to know what the problem might be?? and if I can fix it myself as I really do not have much money to take it to the dealer or a shop.
Thanks for any help

make sure the leads on switch arent reversed just switch them around and see if the lights go off

its better if you go to dealer or workshop. if you don't want to go for this . check your electric cables and the bulb of the light.it may be that the bulb is fused.

Did you check electric cables? if yes then do not take any chance just go to the nearest garage or workshop

You could have a bad brake light switch. Its located on the brake pedal arm under the dash it can be hard to replace depending on the car I would take it to the shop it could also be an electrical problem and those are hard to diagnose sometimes. Good Luck