A control unit for an electrically retractable door mirror includes a motor
to drive rotationally a door mirror to a stored position or a normal
position, a change-over switch, and first and second control circuits. The
first and second control circuits include electronic switches respectively
that are capable of switching on/off depending on the polarity of an
electrical signal switched by the change-over switch. Excess current
detecting devices, whose electrical resistances grow with an increase in a
current, are connected to the electronic switches in series respectively.
And, shutoff switches switch off the electronic switches respectively when
a voltage generated in the excess current detecting devices exceeds a
predetermined value.
