Its your brake fluid. Add more. I bet you $100 ;P
Look at your hand brake. Pull the hand brake up to the top. Look inside the rubber flaps. There is a little tiny button at the bottom that controls the light. Your's is stuck down.
Bet you 20 bucks.
(High School Budget)
its my parking brake light.
Baja Runner you owe me 100 bucks!! fluid level is fine. its my parking brake light. but its not coming on anymore. im doin my brakes tomorrow so ill check things out while im in there.