A self-contained turn signal indicator unit for signaling to the hearing
impaired driver of a motor vehicle that the vehicle's turn signals are
activated. The indicator unit is attached to the cover of the vehicle's
steering column and produces a loud audible signal and a light signal
when the turn signal lever is moved to the turning position. The
circuitry includes a battery, a turn switch activated by movement of the
turn signal lever, and a buzzer and a lamp. A volume control, operable by
a user, controls the volume of the sound. An optional timed switch for
turning off the circuit has a normally closed position and has an open
position for a predetermined period of time after the turn switch is
closed and remains closed.