How do you fix brake lights that just stay on even if you are not in the car?

Often times the brake switch located near and operated by the brake pedal needs to be adjusted. There is a locknut that needs to be loosened and then the whole switch is rotated clockwise (usually) to get it's pin to retract inwards so as to break the circuit. Normally, when the pedal moves away from the switch the pin is pushed out and an internal connection is made to light up the brake lihting circuit. If that does not happen,then the switch could be replaced. If a whole lot of turns are needed, unclip the wiring harness. There would normally be a proper set up procedure specific to the make and model and year. Find out what that is.Also worth looking at is 2 wires shorted together in the circuit. If that's the case you can spend a bit of time tracking it down.It would also tend to drain your battery fairly quickly.The brake lights use a lot of juice to light up a lot of filaments!Remeber this is by design kinda general.