Why do the brake lights stay on even when vehicle is switched off?

Change your brake switch.

try with the brake light switch connected to the wires and push the buttom of the switch f lights goes off --nedds adjusment.

The brake lights work regardless of the ignition switch. There is normally a switch mounted under the dashboard, that presses against the brake pedal hangar. Normally, when you press the brake pedal, this switch loses contact with the hangar, and the brake lights come on. If the switch gets broken or out of adjustment, the brake lights can stay on at all times. This will eventually kill the battery. Readjust or replace the brake light switch.

See if the rubber gaskets are at the top of the brake pedal. If you see two wholes, then they are not there. You might have to go to the dealler for those parts. I used a carriage bolt on the brake switch side for now with ducktape.

brake light switch

Sounds like either your brake pedal switch has somehow gotten misaligned or gone bad. Look at the top of the brake pedal and find the switch. When you push in on the brake pedal the upper part of the pedal should contact a movable button on the switch and move it either in or out (depending on which side of the pedal the switch is on). If you can see the switch contact being moved, and the lights still stay on, it sounds like the switch itself is bad.

sounds like the brake switch is either shorted or mal-adjusted behind the brake pedal and not opening

check switch under brake pedal

the brake light switch is located on the lever that the brake pedal is attached to, near the top. U will need to pull the under dash hush panel off to get at it.

hey i have had this problem before it probably the brake light switch it bad replace that it located under brake pedal