my speedometer dont work and my ABS and my BRAKE LIGHT stays on

Your Vehicle speed sensor is located on the drivers side of the tailshaft of the transmission and sends a signal to your PCM for Speedometor operation.The sensor may be defective. Aslo, oil leaking from the sensor into the wiring will affect the speedometer. The ABS lamp on should be diagnosed as to why it is on. It is possible that the Rear Axle Speed sensor is defective, but you have other components as well, the Rear Wheel Antilock Module (RWAL), the Antilock valves and associated wiring.