My 1990 2.9 4X4 ranger needs help. The ABS engage when they're suppose to but will not disengage. I got them to disengage by bleeding oil from one of the lines but can't recall were. I crawled under the truck and disconected the electrical connection to the the ABS. The brakes work fine with the ABS disconected. I tried replacing the ABS control module under the dash but the same thing happens with a new one. what is causeing this? Thanks1