2014 Cadillac CTS Owner Manual - Page 183

Lighting When DRLs are on, only the reduced intensity low-beam headlamps or dedicated DRLs will be on. The other exterior lamps and the instrument cluster will not be on. When the exterior lamp control is in AUTO and it is dark enough outside, the DRL turn off and the low-beam headlamps will turn on. When it is bright enough outside, the low-beam headlamps will go off, and the DRL will turn back on. If the vehicle is started in a dark garage, the automatic headlamp system comes on immediately. Once the vehicle leaves the garage, it takes about one minute for the automatic headlamp system to change to DRL if it is light outside. During that delay, the instrument cluster may not be as bright as usual. Make sure the instrument panel brightness knob is in the full bright position. See Instrument Panel Illumination Control on page 6-6. Turning the exterior lamp control to off or to the low-beam headlamp position will turn off the DRL. If the parking lamps or the fog lamps were turned on instead, the DRL will still turn off. This will work regardless of gear position and whether or not the parking brake is set. When the DRL are active and a turn signal is operated, the DRL on the side the turn signal is activated, will turn off until the turn signal is turned off. 6-3 To turn off the automatic headlamp system, turn the exterior lamp control to the off position and then release it. Automatic Headlamp System When it is dark enough outside, the automatic headlamp system turns on the headlamps at the normal brightness, along with the taillamps, sidemarker, parking lamps, and the instrument panel lights. The radio lights will also be dim. The vehicle has a light sensor on the top of the instrument panel in the defroster grille which regulates when the automatic headlamps turn on. Do not cover the sensor, otherwise the headlamps will come on whenever the ignition is on. The system may also turn on the headlamps when driving through a parking garage, heavy overcast weather, or a tunnel. This is normal.