I have a 1994 aerostar with abs rear brakes. if i push on the pedal to hard it goes to the floor and both the abs and brake lights come on. the abs light stays on untill i turn the veichle off. the brake light stays on untill i slowly push the pedal down and get pressure. if i push the pedal slowly i get pressure and able to stop, but when i slow down you can feel the pedal give. if you push the pedal hard it goes to the floor and both lights come on. Any help at all would be thankful. thanks.