ABS error code retieval
 

My 1996 Ram 2500HD started flagging an error with the brake system. The "ABS"and (sometimes the "Brake") warning light will come on. The brake still operate and function fine. Since this is pre-OBD I and II and no one has the DRB III scanner, is there a way of causing the warning lights to flash a code?The error I am encountering is not a hard error because when I shut the engine off and turn it back on, the error has been cleared. I have the 4 wheel ABS. I appreciate your help,
Mike