Buick 1998 Century Owner's Manual page 110

Turn Signal and Lane Change Indicator
The turn signal has two upward (for right) and two
downward (for left) positions. These positions allow you
to signal a turn or a lane change.
To signal a turn, move the lever all the way up or down.
When the turn is finished, the lever will return
automatically.
5 I
An arrow on the instrument
panel will flash in the
direction of the turn or
lane change.
1
To signal a lane change, just raise or lower the lever
until the arrow starts to flash. Hold it there until you
complete your lane change. The lever will return by
itself when you release it.
If the arrow flashes faster than normal as you signal a
turn or a lane change, a signal bulb may be burned out
and other drivers won't see your turn signal.
If a bulb is burned out, replace it to help avoid an
accident. If the arrows don't go on at all when you
signal a turn, check for burned-out bulbs and then check
the fuse (see "Fuses and Circuit Breakers" in the Index).
A chime will sound if you leave your turn signal on for
more than 3/4 mile (1.2 km).
Headlamp HigWLow Beam Changer
To change your headlamps
from low beams to high
beams, or high to low, pull
the multifunction lever all
the way toward you. Then
release it.
When the high beams are on, this light on the instrument
panel also will be on.