Wheel bearings... sensors working or not?

[paul ron]

I had the wheel bearings changed on both sides of my 2000 Alero 2.4, 60,000miles.

My question is how do I know the new sensors are working properly? Before I had the bearings done, when I drove over a patch of rough road that is on my regular route I'd get the LOW TRAC light come on. The light has always come on since the car was new 12 years ago. But since doing the bearings the light never comes on now no matter how fast I hit the rough patch.

Is this an indication the sensors aren't working or not hooked up properly? Will this effect the operation of the anti loc brakes or anything else associated with these sensors?

Is there a test I can do to assure me the sensors are working? Should I take it back to the mechanic that did the job?

Thanks.