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Plug-in on Truck for 7-Pin Connector

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Trailer Hitch Parts
7-Pin Electrical Plug for Trailer Wiring

7-Pin Electrical Plug for Trailer Wiring

© Dale Wickell
Trailer wiring connectors come in many configurations. This photo illustrates one design for a 7-pin connector, the type of connector normally used in trailers equipped with electric brakes and/or additional lighting.

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