Ford F series Owner's Manual page 72

The Turn Signal Lever
You can use the turn signal lever on the left side
of the steering column to:
operate the turn signals and cornering lamps
turn the high beams on/off
flash the lamps
turn the windshield wipers and washer
on/off
Turn Signals
Move the lever up to signal a right turn. Move
it down to signal a left turn. The corresponding
indicator light in the instrument cluster will
flash.
If the turn signal stays on after you turn, move
the lever back to the center (off) position.
Turn signal lever and functions
If the turn indicator light in the instrument
panel does not illuminate or remains on (doesn't
flash) when you signal a turn, the turn signaling
system is malfunctioning. Have this condition
corrected as soon as possible, but make sure that
you use the accepted hand signals in the
meantime.
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