Windstar ABS and Brake light always on!

PLease I am in desperate need here. I have a 98 Ford windstar. It has had the ABS and Brake light on constantly for a few months now. Hubby has bled the brakes and cleaned the sensors on the brakes to try and rid the code.Fluid is up to the top(as full as it can get)Heard from a friend of ours that works at a Ford dealership out of state to reset the code Start and shut off your ignition 20 times still didnt work. PLease any sugg. on how to rid this stupid code or what the problem could be? Help
thnx
Mandy