1999 Cadillac DeVille Owner's Manual - Page 104

yellowblue When the Twilight Sentinel switch is on and it's dark enough outside, the low-beam headlamps (at reduced intensity) will turn off and normal low-beam headlamp operation will occur. When the Twilight Sentinel switch is on and it's bright enough outside, the regular lamps will go off, and the low-beam headlamps at reduced brightness will take over for the DRL. If it's dark enough outside and the Twilight Sentinel control is off, a HEADLAMPS SUGGESTED message will display on the Driver Information Center (DIC). This message informs the driver that turning on the exterior lamps is recommended even though the DRL are still illuminated (it's become dark enough outside to require the headlamps and/or other exterior lamps). Turning on the Twilight Sentinel, the headlamp switch or the fog lamp switch will remove the HEADLAMPS SUGGESTED message. To idle your vehicle with the DRL off, turn off the Twilight Sentinel and shift the transaxle into PARK (P). Placing your vehicle in PARK (P) disables the DRL. The DRL will stay off until you shift out of PARK (P). To drive your vehicle with the DRL off, turn off the Twilight Sentinel and manually turn on the parking lamps. As with any vehicle, you should turn on the regular headlamp system when you need it. Fog Lamps (DeVille Concours Only) Use the fog lamps for better vision in foggy or misty conditions. When you press the fog lamp button, a small indicator light will tell you that the fog lamps and the parking lamps are on. Press the button again to turn them off. If you turn on the high-beam headlamps, the fog lamps will turn off. They'll turn back on again when you switch to low-beam headlamps. When the Twilight Sentinel is on and the fog lamp switch is activated, the fog lamps will remain on as well as the headlamps and parking lamps. 2-44