2007 Cadillac STS Owner's Manual - Page 217

An AUTOMATIC LIGHTS OFF message will appear on the DIC, showing that automatic lighting has been disabled. As with any vehicle, you should turn on the regular headlamp system when you need it. Fog Lamps Use the fog lamps for better vision in foggy or misty conditions. The fog lamp controls are located on the turn signal/multifunction lever. Light Sensor - (Fog Lamps): The band with this symbol is used to turn the fog lamps on and off. The parking lamps must be on for the fog lamps to work. To turn the fog lamps on, turn the fog lamp band on the lever up to the dot and release it. The band will return to its original position. To turn the fog lamps off, turn the fog lamp band up to the dot and release it. The band will return to its original position, and the fog lamps will turn off. If the high-beam headlamps are turned on, the fog lamps will also turn off. They will turn back on again when you switch back to low-beam headlamps. Some localities have laws that require the headlamps to be on along with the fog lamps. The light sensor for the DRL is located on top of the instrument panel. If you cover the sensor, it will read dark, and the exterior lamps may come on when you do not need them. 217