System - Cadillac CTS Owner's Manual

The dedicated DRL will come on
when all of the following conditions
are met:
The ignition is on.
The exterior lamp control is
in AUTO.
The light sensor determines it is
daytime.
The parking brake is released or
the vehicle is not in P (Park).
The tail lamps, instrument panel
lights, and other lamps will not
be on.
The DRL turn off when the
headlamps are turned to
ignition is off.
Automatic Headlamp

System

When the exterior lamp control is
set to AUTO and it is dark enough
outside, the headlamps come on
automatically.
If equipped, the light sensor is on
top of the instrument panel or on the
windscreen near the rearview mirror.
Do not cover the sensor; otherwise
the headlamps will come on when
or the
they are not needed.
The system may also turn on the
headlamps when driving through a
parking garage or tunnel.
If the vehicle is started in a dark
garage, the automatic headlamp
system comes on immediately. If it
is light outside when the vehicle
leaves the garage, there is a slight
delay before the automatic headlight
system turns off the headlights.
During that delay, the instrument
Lighting
cluster may not be as bright as
usual. Make sure the instrument
panel brightness control is in the full
bright position. See Instrument
Panel Illumination Control 0 159.
When it is bright enough outside,
the headlights will turn off and the
Daytime Running Lamps (DRL) will
turn on.
The automatic headlamp system
turns off when the exterior lamp
control is turned to or the ignition
is off.
Lights On with Wipers
If the windscreen wipers are
activated in daylight with the engine
on, and the exterior lamp control is
in AUTO, the headlamps, parking
lamps, and other exterior lamps
come on. The transition time for the
lamps coming on varies based on
wiper speed. When the wipers are
not operating, these lamps turn off.
Move the exterior lamp control to
or to disable this feature.
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