How do you know if your used 2000 celica gts has anti lock brakes Does it mean it has one when you have an abs light on your dashboard whenever you start the car?

Just go to a parking lot on a rainy day go above about 40 and slam on the brakes. If you skid you dont have antilock brakes, if you hear that grinding noise that kinda skips and you slow down but dont slid you do.