2015 Cadillac XTS Owner Manual - Page 183
2015 Cadillac XTS Manual
Page 183 highlights
6-6 Lighting Raise or lower the lever until the arrow starts to flash to signal a lane change. Hold it there until the lane change is completed. If the lever is briefly pressed and released, the turn signal flashes three times. The turn and lane-change signal can be turned off manually by moving the lever back to its original position. If after signaling a turn or lane change, the arrow flashes rapidly or does not come on, a signal bulb may be burned out. Replace any burned out bulbs. If a bulb is not burned out, check the fuse. See Fuses and Circuit Breakers on page 10-30. The brightness of the instrument panel lighting and steering wheel controls can be adjusted. Turn and Lane-Change Signals Interior Lighting Instrument Panel Illumination Control Move the lever all the way up or down to signal a turn. An arrow on the instrument cluster flashes in the direction of the turn or lane change. D (Instrument Panel Illumination): Move the thumbwheel up or down to brighten or dim the lights.