1999 Cadillac Catera Owner's Manual - Page 127

yellowblue This light will come on when you start your engine, and it will flash for a few seconds. Then the light should go out. This means the system is ready. If the air bag readiness light stays on after you start the engine or comes on when you are driving, your air bag system may not work properly. Have your vehicle serviced right away. The air bag readiness light should flash for a few seconds when you turn the ignition key to ON. If the light doesn't come on then, have it fixed so it will be ready to warn you if there is a problem. Charging System Indicator Light When you turn the key to START, 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 the battery until you get there, turn off all accessories. Voltmeter You can read battery voltage on the voltmeter. If it reads less than 12 volts or more than 16 volts while the engine is running, and it stays there, you may have a problem with the electrical charging system. 2-65