2001 Ford Windstar ABS RECALL

Had the front and rear breaks replaced by local mechanic in July 2009. After brake service, brakes locked up every time brakes were pressed hard. (Note-this happened once a year or more earlier, but only once.) Took back to mechanic and he replaced ABS module twice. (He said the first one he installed was defective.) He finally told me the brakes worked fine, but ABS and brake lights were now on, and he could not get the lights to go off. Took car to Ford dealer, and they said the ABS module needed to be replaced again for around $2300. Did not do this since I had spent hundreds on the previous work and didn't feel the vehicle was worth what this work would cost. Have driven the car ever since. Brakes worked fine until recently. The brakes seem to stop the car alright, but it does not stop smoothly any more. There is a surging feeling when I come to a stop. Feels like I need new brake pads again. Could any of this be related to the ABS brake recall on 2001 Ford Windstars? Thanks