2003 Honda S2000 Owner's Manual - Page 229

Charging System Indicator CHARGING SYSTEM INDICATOR Immediately turn off all electrical accessories: radio, heater, A/C, cruise control, etc. Try not to use other electrically-operated controls such as the power windows. Keep the engine running and take extra care not to stall it. Starting the engine will discharge the battery rapidly. By eliminating as much of the electrical load as possible, you can drive several miles (kilometers) before the battery is too discharged to keep the engine running. Drive to a service station or garage where you can get technical assistance. This indicator should come on when the ignition switch is ON (II), and go out after the engine starts. If it comes on brightly when the engine is running, it indicates that the charging system has stopped charging the battery. Taking Care of the Unexpected 233