i have a 1998 blazer lt 4x4 and my ABS light comes on and off every time i hit a bump on my driver side wheel or when i turn what is going on i clean the sensor and put a new o ring on it and everything is tight except someone told me my lower ball joint is going bad can this cause this or a bad wheel bearing need help asap and oh at low speeds my ABS will kick in wtf. what causing this