Trailer Wiring Extension Harnesses

A trailer wiring extension harness provides the perfect way to route a 7-way RV blade connector from the back of your pickup into the truck bed for towing goosenecks, 5th wheels, and other heavy-duty trailers. You can plug into your existing 7-way truck trailer wiring harness or branch off to retain use of both sockets for all-around ease and convenience.

New to trailer wiring?

Trailer Wiring Extension HarnessesTrailer Wiring Extension Harnesses
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Curt™ CURT 8' Dinghy Towing Adapter & Socket (7-Way RV Blade to 6-Way Round Vehicle) #57283

SKU: 2021017458

$ 84.95
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Curt™ CURT 8' Dinghy Towing Electrical Extension & Sockets (6-Way Round) #57286

SKU: 2021017461

$ 86.95
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Curt™ CURT 8' Dinghy Towing Electrical Adapter & Socket (7-Way RV Blade, Fits USCAR) #57284

SKU: 2021017459

$ 84.95
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Curt™ CURT 8' Electrical Adapter Harness (7-Way RV Blade Vehicle to 4-Way Flat Trailer) #57280

SKU: 2021017456

$ 42.95
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Curt™ CURT 8' Dinghy Towing Adapter & Socket (7-Way RV Blade to 4-Way Round Vehicle) #57285

SKU: 2021017460

$ 76.95
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Curt™ CURT 7' 7-Way RV Blade Extension Harness (Routes to Truck Bed) #56080

SKU: 2020103519

$ 62.95
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Curt™ CURT 8' Electrical Adapter Harness (7-Way RV Blade Vehicle to 5-Way Flat Trailer) #57282

SKU: 2021017457

$ 51.95
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Curt™ CURT 7' Custom Wiring Extension Harness (Adds 7-Way RV Blade to Truck Bed, Packaged) #56070

SKU: 2020107055

$ 76.95
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Curt™ CURT Custom Wiring Harness Extension Isolator Kit for Aluminum Truck Beds #57007

SKU: 2020103541

$ 11.95
CURT has the trailer wiring harness extensions you need to extend your connection to your trailer.CURT has the trailer wiring harness extensions you need to extend your connection to your trailer.

We Have the Trailer Wiring Extensions You Need

A trailer wiring extension is a great way to increase the length of your wiring harness when routing a connection from your pickup to your RV.

We offer trailer wiring extension harnesses for a variety of harnesses with differing connection types, such as a 7-way RV blade sockets, 6-way round sockets, and 4-flat or 5-flat plugs.  

Our trailer wiring extensions with 6-way round sockets are designed to create an extended connection between a dinghy-towed vehicle and an RV. CURT 7-way blade harness extensions are ideal for RV applications and plug into a factory USCAR outlet.

In the case that the connection between your vehicle and trailer isn't the same, CURT makes tow wiring adapters for trailer wiring extensions with unique connections. Our 7-way-RV-blade-vehicle-to-4-way-flat-trailer and 7-way-RV-blade-to-4-way-round-socket are a perfect way to tow a dinghy vehicle, RV, or trailer with differing connections than your truck.

Our trailer wiring extensions are made with high-quality, UV-resistant, coiled cable that extends up to 8' without scraping the ground and are built to last for many adventures.  

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