2004 Cadillac DeVille Owner's Manual - Page 175

When the ignition is on, the brake system warning light will also come on when you set your parking brake. The light will stay on if your parking brake does not fully release. If it stays on after your parking brake is fully released, it means you have a brake problem. Anti-Lock Brake System Warning Light With the anti-lock brake system, the light(s) will come on when your engine is started and may stay on for several seconds. That is normal. {CAUTION: Your brake system may not be working properly if the brake system warning light is on. Driving with the brake system warning light on can lead to an accident. If the light is still on after you have pulled off the road and stopped carefully, have the vehicle towed for service. If the light comes on while you are driving, pull off the road and stop carefully. You may notice that the pedal is harder to push. Or, the pedal may go closer to the floor. It may take longer to stop. If the light is still on, have the vehicle towed for service. See Towing Your Vehicle on page 4-31. If the light stays on, turn the ignition to OFF. Or, if the light comes on when you are driving, stop as soon as possible and turn the ignition off. Then start the engine again to reset the system. If the light still stays on, or comes on again while you are driving, your vehicle needs service. If the regular brake system warning light is not on, you still have brakes, but you do not have anti-lock brakes. If the regular brake system warning light is also on, you do not have anti-lock brakes and there is a problem with your regular brakes. See Brake System Warning and Parking Brake Indicator Light on page 3-48. The anti-lock brake system warning light should come on briefly when you turn the ignition key to ON. If the light does not come on then, have it fixed so it will be ready to warn you if there is a problem. 3-49