Why won't parking brake light go off in my 2000 Honda Accord?

More than likely it has to do with the brake light switch. There is a contact button on the brake light switch that is depressed whenever the brake pedal returns to it's normal position (not depressed). This contact is pressed in by the upper part of the brake pedal. You can check the operation of the switch by pressing and releasing the contact button with your finger while someone checks to see if the brake light goes on and off. If the brake light goes on and off, the switch is OK. There may be a missing pad on the brake pedal that is causing the switch contact button to not be depressed. There may be a hole where this pad was once attached and the switch contact button is now going into the hole and not getting depressed. One solution is to place a bolt into this hole and secure it with a nut. Place the bolt so the head of the bolt will now come in contact with the switch. Otherwise, go to your Honda dealer and get a new brake switch contact pad.