1993 Cadillac DeVille Owner's Manual - Page 118

r Here's how your light systems work: Headlight "On" Warning If the manuallight switch isleft on (as when someone has parked your car), you'll hear awarning tone when you turn off the ignition and open the driver's door. Twilight Sentinel - r I The control will look like this: i . It switches your lights andoff by sensing how dark itis outside. on 105