My brake light comes on every couple of days for the first start up of the car. It stays on and when I go to brake it turns off. When i start to go again it comes back on. My brake fluid is good and my emergency brake is completely down. I'm thinking its my brake pads that need replacement. But when I get back into my car again, it doesn't come on for the rest of the day, and may not even come back on for a couple of days.