What is claimed is:

1. An electric winch system comprising:

an electric winch provided on the outside of a vehicle body;

a DC power source within an engine compartment of said vehicle;

a direction control switch assembly including a control switch;

a pair of connector parts, said connector parts when communicating together providing a first circuit for actuating a means controlling a power switch connector to said winch whereby said winch is energized only when said connector parts communicate, and a second circuit responsive to said direction control switch for controlling the direction of said winch;

a power switch, said power switch applying an operating voltage to said winch; and

means for controlling said power switch in response to a signal from said first circuit whereby said power switch is enabled when said connector parts are communicating.

2. An electric winch system as defined in claim 1, wherein said means for controlling said power switch comprises a relay, and said means for controlling provides a closed circuit which is completed through energization of a coil of said relay when said pair of connector parts are joined to each other.

3. An electric winch system as defined in claim 2, wherein said winch include an DC series electric motor, and said control switch controls a direction of the field of said DC series motor.

4. An electric winch system as defined in claim 3, wherein said electric winch is an assembly which comprises a winch mechanism, the electric motor for operating said winch mechanism, a normal rotation relay, and a reverse rotation relay, both of which are provided between said power switch means and said electric motor and controlled by said means for controlling.

5. An electric winch system as defined in claim 4, wherein said normal rotation relay and said reverse rotation relay are connected to separate series field coils of said electric motor, respectively, and said series field coils are so arranged as to form field systems directed opposite to each other when a current is supplied thereto.

6. An electric winch system as defined in claim 5, wherein said electric winch assembly comprises a means for detecting a temperature of said electric motor, and said control switch assembly comprises said control switch and indication means connected by way of said pair of connector parts to said temperature detecting means.

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