The brake lights on my '92 Grand Am won't go out. Even if I pull the fuse and shut the car off! I suspect the 'Stop Switch', but where is it and how do I replace it?

The brake lights on my '92 Grand Am won't go out. Even if I pull the fuse and shut the car off! I suspect the 'Stop Switch', but where is it and how do I replace it?
underneath the dash its a plug on the brake pedal its on the back of that pole it just twist out then you have to disconnect the wire then replace its real easy and they call that at the auto part store brake switch