I'm curious about this, about a few year ago me and a buddy of mine were installing my rear suspension but unfortunately my 4runner had fallen off the jackstands due to a miscommunication while lifting and as a result I've had an ABS light on ever since but noticed no issues while driving and or braking until recently. so the ABS system prevents tires from locking up, however mine seem to lock up and I have issues in light rain (roads tend be the most slick at this time) and will skid across the road and its caused me one rear ending and a close second. So should I still go into deleting the ABS? or work on figuring out why the light is on the in the first place (some sort of sensor I'm assuming?) and then go about deleting it properly.