1995 Geo Tracker, brake light on dash stays on after start. At first i thought it was the emergency brake switch, but i found that, and i works correctly. The master cylinder is full, and i dont see any leaks. The truck stops with no problems. I have removed all 4 wheels, and plenty of pad and rear shoes left. My owners manual says i have rear anti lock brakes, but there are no wires or sensors i can see at the rear wheels. My check engine light goes out right after start. Any suggestions would be appreciated.