2012 Buick LaCrosse Owner's Manual - Page 171

Lighting 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 might be burned out. Have the bulbs replaced. If the bulb is not burned out, check the fuse. See Fuses and Circuit Breakers on page 10‑36. 6-5 Fog Lamps To turn on the fog lamps, the ignition and the headlamps or parking lamps must be on. If the fog lamps are turned on while the exterior lamp switch is in the AUTO position, the headlamps come on automatically. For vehicles with fog lamps, the button is located on the exterior lamp control, left of the steering wheel. # : Press to turn on or off. An indicator light on the instrument panel cluster comes on when the fog lamps are on. Some localities have laws that require the headlamps to be on along with the fog lamps.