The warning lights for ABS and brakes came on today after I put my KJ in R to back out of my driveway. They stayed on all the way to my mechanic, where he connected it to a computer check. It said my front L&R brake sensors were not operating. He looked around and thought that would be unusual for both to fail at the same time. He then suggested it might be the electronic module connected to the master brake cylinder. He said Ford & GM autos have a similar system and it just might need to be rebuilt. He said the vehicle was still drivable while the module is sent off to be rebuilt, but the ABS would not work during emergency stops. After the testing (actually, during the testing, between engine shutoffs) the dash lights went off and have remained off. Now I wonder if it was just a fluke related to our cold weather - snow and freezing temperatures lately. Recently I had the mechanic put new disks and brake pads on all around and began to hear a kind of binding noise upon backing out of my driveway, but that sound didn't repeat after pulling away. It only happens when I first start up and back out and not again for the rest of the day. Anyone here experience anything similar? Any ideas what to do? Should I get the module rebuilt or buy a new one? I don't know what the actual name of that thing is, so I don't know what to look for.