Hi,
The brake light switch which is operated by the brake pedal ''may'' be loose or faulty.
Here’s the procedure which shows how to check the brake pedal adjustment. It shows the switch.
Try disconnecting the wires from the brake light switch and check if the brake lights turns off.
''If they do'' then there is a problem with the switch.
''If they don’t'' then there is a problem with the wires from the switch to the brake light failure sensor, the sensor itself or other circuits in the car such as trailer light wiring, cruise control etc.
Here are some images which show the brake switch and the wiring diagram for the brake lights which may help.
[image|1984124]
[image|1984123]
(click on images to enlarge for better viewing)
Don’t know your car but do you also get a brake warning light in the dashboard instrument panel by any chance?
If so check that the level of the brake fluid in the brake master cylinder is OK.