Newbie w/99 Diamante

Hello all - I'm new to this site.  Have a question about my car - 99 Diamante, 30K miles, just bought in March '03.  My warning lights are on for Anti-lock, Battery and Brake.  No codes show on the diagnostic, had brand new battery put in which appeared to have fixed problem.  Within 1/2 hour of driving, all the above lights came on again?  Will be taking to dealer tomorrow or Monday.

In the meantime, does anyone know what could be causing this?  The car runs like a charm otherwise.  Appreciate any feedback

ESylk