1999 Chevrolet Corvette Owner's Manual - Page 104
1999 Chevrolet Corvette Manual
Page 104 highlights
yellowblue Fog Lamps (Option) Twilight Sentinel (Option) Twilight Sentinel provides a period of exterior illumination as you leave the vicinity of the vehicle. The feature is activated when the headlamps are on due to the optional Automatic Headlamp Control feature described previously in this section, and when the ignition is turned off. Your headlamps will then remain on until the headlamp switch is moved from OFF to the parking lamp position or until an illumination period has elapsed. See "Driver Information Center (DIC)" in the Index to select the desired illumination period. If you turn off the ignition with the headlamp switch in the parking lamp or headlamp position, the Twilight Sentinel cycle will not occur. Use the fog lamps for better vision in foggy or misty conditions. Your parking lamps or low-beam headlamps must be on or the fog lamps won't work. To turn the fog lamps on, push the button located on the instrument panel to the left of the steering column. A light on the button will come on when the fog lamps are on. Push the button again to turn the fog lamps off. You can customize the vehicle to activate the Twilight Sentinel when the ignition is turned off under the conditions listed previously, or you may choose not to activate this feature under any conditions. See "Driver Information Center (DIC)" in the Index to customize this feature. 2-52