Amazon.com: 7 pin trailer wiring harness
AA Ignition 7 Way Trailer Extension Cord - 4 feet - Double Prongs Connector - 7 Pin Trailer Wiring Connector Plug - Gooseneck Hitch Extender or 5th Wheel Trailer, RV, Caravan, Truck, Van - 10-14 AWG. $18.99. $18.
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