Automatic Headlamp System; Lamps On Reminder; Daytime Running Lamps - Hummer 2003 H2 Owner's Manual

Automatic Headlamp System

When it is dark enough outside and the headlamp switch
is in AUTO, your automatic headlamp system will turn
on your headlamps at the normal brightness along with
other lamps such as the taillamps, sidemarker, parking
lamps, roof marker lamps and the instrument panel
lights. The radio lights will also be dim.
To turn off the automatic headlamp system, turn the
exterior lamps switch to the off position and then
release.
Your vehicle has a light sensor located on the top of
the instrument panel. Be sure it is not covered, or the
system will be on whenever the ignition is on.
The system may also turn on your headlamps when
driving through a parking garage, heavy overcast
weather or a tunnel. This is normal.
There is a delay in the transition between the daytime
and nighttime operation of the Daytime Running Lamps
(DRL) and the automatic headlamp systems so that
driving under bridges or bright overhead street lights
does not affect the system. The DRL and automatic
headlamp system will only be affected when the light
sensor sees a change in lighting lasting longer than
the delay.
2-50

Lamps On Reminder

If a door is open, a reminder chime will sound when
your headlamps or parking lamps are manually turned
on and your key is out of the ignition. To turn off the
chime, turn the headlamp switch to off or AUTO and
then back on. In the automatic mode, the headlamps turn
off once the ignition is in LOCK and the headlamps on
at exit delay ends (if enabled in the DIC).

Daytime Running Lamps

Daytime Running Lamps (DRL) can make it easier
for others to see the front of your vehicle during
the day. DRL can be helpful in many different
driving conditions, but they can be especially helpful
in the short periods after dawn and before sunset.
Fully functional daytime running lamps are required
on all vehicles first sold in Canada.
The DRL system will come on when the following
conditions are met:
D
The ignition is on,
D
the exterior lamps control is in AUTO,
D
the transmission is not in PARK (P), and
D
the light sensor determines it is daytime.