Air Brake Antilock problems of the 1996 Dodge Grand Caravan

My complaint is on the abs system of my vehicle--not the airbags!!! when I attempt to stop at an intersection or stop sign the brakes are locking up on me while jerking to a stop. The brake pedal has locked up completely and the abs light continuosly comes on when you use the brakes. I have spent in excess of $600. Replacing parts, changing tires, etc. I have been to 5 mechanics including the Dodge dealership and no one can figure anything out. I must have an answer to what this is before my children or myself are killed because the brakes fail. I am so frustrated and am currently not even driving the vehicle except to the next mechanic. Please help!!!!!!!!!!!!!!!!.