2001 Cadillac DeVille Owner's Manual - Page 154

Charging System Light When you turn the key to ON, this light will come on briefly to show that the generator and battery charging systems are working. If this light stays on, you need service and you should take your vehicle to the dealer at once. To save your battery until you get there, turn off all accessories. Brake System Warning and Park Brake Indicator Light Your vehicle's hydraulic brake system is divided into two parts. If one part isn't working, the other part can still work and stop you. For good braking, though, you need both parts working well. If the warning light comes on, there is a brake problem. Have your brake system inspected right away. This light should come on briefly when you turn the ignition key to ON. If it doesn't come on then, have it fixed so it will be ready to warn you if there's a problem. 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" in the Index. 2-84