I just bought a mint 1993 cadillac sts with 53,000 miles on it a week ago and ran great for a week. Today when i started it up the abs brake light came on. It didnt ride any different, but its really an eye sore on the dashboard. Im wondering how to get this to go off and if turning on the defroster had anything to do with it

get yourself a pen and paper, go out to the car turn the ignition on and press the off and warmer buttons on the climate control together and pull any codes that are there, post them here and we can find out whats causing the ABS light to come on