[erryja]

Don't consider me any kind of expert. But the way I think the ABS system works is the sensor at each hub senses the rotation of each wheel. If one of the sensors is getting a different reading than the other wheel the ABS will kick in. This could be from something blocking one of the sensors. I also thing the sensor is magnetic so just unhook the sensors & check them for obstructions or that they are just not dirty. Doing this can only help.