ABS/Track Control light

My abs and track would come on when i would hit a decent size bump. Now it is on all the time.

Either a wheel speed sensor harness is corroded, or the wheel speed sensor itself is bad. The Wheel speed sensors are part of the hub assemblies, and are not replaceable separately. Normally, it's a front hub if both the trac off and abs lights come on, but not always. An abs capable scanner or testing the resistance at the wheel are the only way to narrow it down as to which wheel is the culprit.