Cadillac 2002 DeVille, Owner'S Manual

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When DRL are on, only your high
-
beam headlamps
(at reduced brightness) will be on. No other exterior
lamps such as the parking lamps, taillamps, etc. will be
on when the DRL are being used. Your instrument panel
won’t be lit up either.
When the Twilight Sentinel
R
lever is on and it’s dark
enough outside, the high
-
beam headlamps (at reduced
intensity) will turn off and normal low
-
beam headlamp
operation will occur. When the Twilight Sentinel lever is
on and it’s bright enough outside, the regular lamps
will go off, and the high
-
beam headlamps at reduced
brightness will take over.
If it’s dark enough outside and the Twilight Sentinel
lever is off, a HEADLAMPS SUGGESTED message
will display on the Driver’s Information Center (DIC).
This message informs the driver that turning on the
exterior lamps is recommended even though the
DRL are still illuminated.
Turning on the Twilight Sentinel or the headlamps will
deactivate the DRL and remove the HEADLAMPS
SUGGESTED message. If the parking lamps or the
fog lamps were turned on instead, the DRL will still
deactivate and the HEADLAMPS SUGGESTED
message will continue to be displayed.
To idle your vehicle with the DRL off at night, turn
off the Twilight Sentinel and shift the transaxle into
PARK (P). Placing your vehicle in PARK (P) disables
the DRL. The DRL will stay off until you shift out
of PARK (P).
To drive your vehicle with the DRL off, turn off the
Twilight Sentinel and manually turn on the parking
lamps or fog lamps (if equipped).
As with any vehicle, you should turn on the regular
headlamp system when you need it.