I've read your other questions and the answers given. It is good counsel. If you did everything already suggested and are still having problems, then at the very least buy a Haynes manual or Chiltons manual (available at most parts stores) for your year and make of van. Read and follow the proceedures and it that doesn't work it's time to have a Ford dealer mechanic look at it.
ABS repairs can be frustrating at least and dangerous if done improperly. The ABS pump may need to by cycled to purge the air and you need a scan tool for that with ABS software. You will need a repair manual to know for sure. They are around twenty bucks and well worth the mone