The ab. and tracking light come on and go off and back on

This soundslike a bad speed sensor, you will need to have the computer scanned for codes, the computer turns on the light and stores the code, the code will tell you what has gone wrong and with some testing you can find the problem, the most common problem could be a bad wheel speed sensor, both light are on due to the abs problem because the trac control uses the abs speed sensors to watch wheel speed so if the computer sees a problem with the abs it turns off the trac and turns on the light. after the abs is repaired the trac light will go out, start by having the codes read, a scan tool is needed to get the codes, there are many auto part stores that scan the computer for free but i dont know if they scan for abs codes, you will have to check that out. good day.