Cadillac 1993 Fleetwood Owners Literature page 113

A green arrow on the
instrument panel will
flash in the direction of
the turn or lane
change.
If the turn signal remains on after you have driven about .5 mile
(.8
km),
a reminder chime will sound until you turn the turn signal off.
To signal a lane change, just raise or lower the lever until the green arrow
starts to flash. Hold it there until you complete your lane change. The
lever will return by itself when you release it.
AS you signal a turn or a lane change, if the arrows don't flash but just
stay on, 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 green
arrows don't go on at all when you signal a turn, check the fuse (see
"Fuses" in the Index) and for burned-out bulbs.
If you have a trailer towing option with added wiring for the trailer lights,
a different turn signal flasher is used. With this flasher installed, the
signal indicator will flash even if a turn signal bulb is burned out. Check
the front and rear turn signal lights regularly to make sure they are
working.
Operation of Lights
Although your vehicle's lighting system (headlights, parking lights, side
marker lights and taillights) meet all applicable federal lighting
requirements, certain states and provinces may apply their own lighting
regulations that may require special attention before you operate these
lights. For example, some jurisdictions may require that headlights be
turned on whenever you must use your windshield wipers. In addition,