1998 Cadillac Catera Owner's Manual - Page 115

Ifyou rotate the control dial all thewayup,the lamps Light Sensor will remain on for about three minutes after the ignition has been turned to or LOCK. If you rotate the OFF control dial all the down, the lamps will off way go quickly. You can adjust the delay time a few from seconds up to three minutes. To turn the twilight sentinel off, press the OFF button again. The indicator lightin the button will be on. This lets the driver know that system has been turned the off. The twilight sentinel also turns if the ignition off is turned toOFF or to LOCK. - . ~ ~ - This light in the instrument -- panel will come on if the ignition is on and: The light sensorfor the twilight sentinelis located in the center of the front defogger grille. you cover the If sensor, it will read "dark" and the parking lamps and low-beam headlamps will come on. 0 0 0 0 The headlamps have not been manually turned on, The twilight sentinel senses it is dark outside, The twilightsentinel is OFF and The transmission is not in PARK (P).