If the brake lights stay on even when the car is off I would suggest checking the pedel itself. There should be a plastic/rubber plug that rests against the switch that controls the brake lights. If this plug falls out or becomes damaged then the pedel shaft never compresses the switch to an off position. Other than that you might want to look at a wiring diagram and trace the brake switch circuit to make sure there isn't a short in the circuit. I had this problem on an 87 Sentra years ago so I imagine Nissan hasn't changed the design in their cars all that much. Hope this helps.
Check bulbs they are double filamented smaller for brake lights larger for tailights Check fuses Check stop light switch
Check the fuse, check the bulbs and check the brake light switch, it should be one of those.
Check the bulbs Check the stoplight fuse Check the operation of the stop light switch
They are two seperate circuits. Check the fuses and the bulbs.
Check the switch on the pedal
blowen fuse or lights check fuse first
Check for a bad ground circuit at the rear tial lights.
There's a separate relay for the tail/brake lights. Check the wiring also.
There is a stoplight switch near the brake pedal; this may be faulty. Check your fuses also.
Check stop light switch - usually located at the upper end of the brake pedal under dash
Check the Brake switch that's mounted on the brake pedal bracket, they can get jamed and cause the contacts to pass the 12 volts to the lights. Good luck!
BEHIND THE BRAKE PEDAL