You picked the wrong forum to ask the question about your ABS light coming on. The common faults forum is for people to list known problems, and no one can reply to it (except administrators)

The ABS light coming on when you brake indicates something is wrong with the ABS system. It's likely that there are dirty contacts somewhere, or bad earthing somewhere.

Are you in Sydney? If you can't sort it out yourself, take the car to Paul Vassallo at AP Automotive in Gladesville: 9817 2134