Buick 1993 LeSabre Owner's Manual page 98

Press the PARK switch to turn the parking lights on.
Press it again to turn them off. (If the parking lights
were turned on with the PARK switch, they must be
turned off with that switch).
Lights 660N'Z Warning
If the parking light or headlight switch is left on you'll
hear a warning tone when you turn the ignition
off
and
open the driver's door.
Panel Lights
c
The instrument panel
intensity can be adjusted by
I
moving this lever between
"LO" and "HI". The
interior courtesy lights can
be turned
on
by sliding the
lever all the way to the
right.
Time Out Feature (Option)
The interior lights will automatically shut off after a
10 minute period if a door is left ajar. This feature is
designed to help eliminate battery wear down.