1993 Chevrolet Lumina Owner's Manual - Page 94

Features & Controls Voltmeter (OPTION) When the engine is running, the gage shows the condition of the charging system. Readings betweenthe red warning zones indicate normal the operating range. Readings in either red warning zone indicate a possible problem in the electrical system. Have your vehicle serviced immediately. When your engine is running, but not the ignition ison (in the Run position), the gage shows your battery's state of charge. Battery Warning Light Brake System Warning Light Your Chevrolet's hydraulic brake The charging system light will come on briefly when youturn on the ignition as system is divided into twoparts. If one a checkto show you it is working. Then part isn't working,the other part can it should go out. If it stays on, or comes still workand stop you. For good parts on while you are driving, you may have braking, though, you need both working well.If the warning light goes a problem withthe electrical charging on, there could be a brake problem. system. It could indicate you have that a loose generator drive belt another or Have your brake system inspected right electrical problem. Have it checked away. right away. Driving while this light is on This light should come onas you start could drain your battery. the vehicle. If it doesn't come on then, If you must drive a short distance with have it fixed so it will be ready warn to the light on, be certain to turnoff all you if there's a problem. your accessories, suchas the radio and air conditioner.