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Wire and Function In A 7-Way Connector To Allow Brakes To Release When Backing Up A Boat Trailer | etrailer.com
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Amazon.com: Oyviny Heavy Duty 7 Way Trailer Plug Cord with Double Prongs Connector 4 Feet 7 Pin RV Blade Inline Trailer Wiring Harness Plug Extension Cable Waterproof & Corrosion Resistant (4ft) : Automotive
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