If the brakes work fine then check the master cylinder to see if it is filled all the way. There is a float inside the master cylinder to indicate when the fluid is low. If you are a little low the float could cause the light to come on when you make a turn, when the fluid goes to one side. After the turn the fluid will even out again causing the light to go out.
Hope this helps. BYM
Monday, November 20th, 2006 AT 9:16 AM