Buick 1994 Roadmaster Owner's Manual page 106

Your Twilight Sentinel.,and
Daytime Running Lights
(Canada Only)
work
with
the light sensor on top of
your instrument panel.
Don't cover it up, if you do,
it will read ''dark" and your
lights will
come
on.
Daytime Running Lights (Canada Only)
The Canadian Federal Government has decided that
"Daytime Running Lights" (DRL) are a usehl feature,
in that DRL can make your vehicle more visible to
pedestrians and other drivers during daylight hours.
DRL are required on new vehicles sold in Canada.
Your DRL work with a light sensor on top of the
instrument panel. Don't cover it up.
The low beam headlights will come on at reduced
brightness in daylight when:
The ignition is on
The headlight switch'is off, and
The parking brake is released.
At dusk, the exterior lights will come on automatically
and the low beams will change to full brightness. At
dawn, the exterior lights will go out and the low beams
will change to the reduced bdghtness of DRL (if the
headlight switch is
off).
Of course, you may still turn on the headlights any time
you need to.
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