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CURT 56070 7-Foot Vehicle-Side Truck Bed 7-Pin Trailer Wiring Harness Extension, Select Chevrolet, Dodge, Ford, GMC, Nissan, Ram, Toyota , black

4.8 4.8 out of 5 stars 2,303 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Automotive Replacement Electrical Wiring Harnesses by CURT

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Purchase options and add-ons

  • TRUCK BED EXTENSION. This trailer wiring harness is designed to be an extension of the existing tow wiring of your truck. It retains use of the rear 7-way RV blade socket, while adding an additional 7-way socket in the truck bed
  • EASY TO INSTALL. No wire cutting! No splicing! This trailer wire extension plugs into existing factory wiring on your truck and has a 7-foot harness for flexible positioning in the truck bed (2-1/8-inch hole saw required for installation)
  • HEAVY-DUTY CONNECTOR. The 7-pin trailer wire extension can be used to connect trailer taillights, brake lights, reverse lights, turn signals, electric trailer brakes and an auxiliary power wire
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of the 7-pin truck wiring socket is made from durable molded black plastic and has a spring-loaded dust cover to protect the connection points
  • VEHICLE-SPECIFIC. This vehicle-trailer wiring extension harness is designed for select models of Chevrolet, Dodge, Ford, GMC, Nissan, Ram and Toyota vehicles, ensuring the easiest possible installation
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Important information

Legal Disclaimer

The information provided is for general informational purposes only.


From the manufacturer

CURT Custom Trailer Wiring

Wherever your work or play takes you

CURT offers custom trailer hitches, electrical products and a complete line of towing accessories to get you there with confidence and enjoy every mile of the journey.

4 Pin Trailer Wiring Harness Connector

CURT Custom Vehicle-Trailer Wiring Harness

Custom fit. Plug-and-play. Reliable power.

A CURT custom trailer wiring harness is the easiest way to equip your vehicle with the proper electrical connection for towing a trailer. Our custom wiring offers simple, plug-and-play convenience with no cutting or splicing required, and provides a reliable connection for powering your trailer lights.

Best of all, each CURT custom trailer wiring harness is made vehicle-specific for a unique make and model. This makes installation hassle-free and ensures optimal performance with your vehicle.

Key features of CURT trailer wiring

  • Simple, plug-and-play installation
  • Constructed with SMT circuitry
  • Provides a standard trailer wiring output, usually 4-way or 5-way flat
  • Dust cover included to keep connector clean when not in use

Installation of CURT custom vehicle trailer wiring

CURT Trailer Wiring Connector Custom Vehicle Wiring

CURT Vehicle Trailer Wiring Installation

CURT Custom Trailer Wiring Installation Auto

CURT Vehicle Trailer Wiring Connector Plug In

Two types of trailer wiring

CURT offers two types of custom trailer wiring: custom wiring harnesses and custom wiring connectors. Both are made for specific vehicles, and both require zero cutting or splicing.

Custom trailer wiring harnesses

A custom trailer wiring harness (also known as a ‘T-connector’) is designed to ‘T’ into your vehicle’s taillight assembly. This simply requires access to the taillight wiring.

Custom trailer wiring connectors

A custom wiring connector uses a single plug to plug into a designated OEM socket on the vehicle. Not all vehicles are equipped with this socket, but it does make installing very easy.

Both vehicle-specific

Each custom trailer wiring harness and connector is made for a specific make and model, featuring the necessary components to provide a standard trailer wiring output.

CURT Towing Electrical Trailer Wiring Gooseneck Farm Truck

Selecting custom wiring

Whatever your lifestyle, choosing the right CURT custom trailer wiring harness for your vehicle is easy. Simply use your vehicle's year, make, model and style.

Benefits of CURT surface mount technology (SMT)

CURT Trailer Wiring Circuitry

CURT Trailer Wiring Lights

CURT Trailer Wiring Harness 7-Way RV Blade

Minimum heat generation

The high-quality components used in our custom trailer wiring create very little resistance to reduce heat, limit voltage drop and extend the life of the circuits.

Optimum light intensity

SMT is manufactured with automated processes for maximum consistency and the highly efficient circuitry promotes optimum intensity and life for the trailer light.

Durable performance

Surface mount technology is able to better withstand shaking and vibrations, conditions that are common while towing, compared to traditional through-hole-mount tech.

Product Description

There is nothing like the luxury and power that go along with heavy-duty towing. 5th wheel RVs offer a deluxe, home-away-from-home experience unlike any other, while gooseneck trailers possess a strength that far surpasses most other trailer options. As with any trailer, however, 5th wheels and goosenecks must be equipped with the proper lighting and electrical systems, and tend to require even more complex connectors than a standard receiver-type trailer setup. Make things simple with a CURT 5th wheel / gooseneck extension harness. These wiring harnesses are designed to put an extra connector socket in the bed of your pickup truck while still retaining power to the rear connector socket mounted on your bumper. This is done by plugging into the back of the existing original equipment (OEM) harness and routing through the body of the truck to a hole in the truck bed, providing a connector that is ready to accommodate your 5th wheel or gooseneck trailer. This CURT extension harness is designed to work with 7-way RV blade connectors and comes in a length of 7'. It is compatible with a certain models of Chevrolet, Dodge, Ford, GMC, Nissan, Ram and Toyota (see application to verify fitment). When you need a towing electrical solution that allows you to switch back and forth between your receiver hitch and specialized trailer hitch, CURT gets you plugged in.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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CURT 56070 7-Foot Vehicle-Side Truck Bed 7-Pin Trailer Wiring Harness Extension, Select Chevrolet, Dodge, Ford, GMC, Nissan, Ram, Toyota , black


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What's in the box

  • 1 5TH WHEEL/GOOSENECK HARNESS, 7'
  • Product guides and documents

    Looking for specific info?

    Customer reviews

    4.8 out of 5 stars
    4.8 out of 5
    2,303 global ratings

    Customers say

    Customers like the ease of installation, quality, fit and appearance of the auto accessory. For example, they mention it's super easy to install, works great and that the wiring harness was a perfect fit. That said, opinions are mixed on the cord.

    AI-generated from the text of customer reviews

    222 customers mention217 positive5 negative

    Customers find the installation of the auto accessory to be easy. They mention that the instructions are clear, and the product is easy to add a plug for a camper or fifth wheel. Some say that the product plugs right up to their factory wiring and doesn't require any wire splicing.

    "Works perfectly when installing a gooseneck in my truck. Easily installed. Looks nice and fits good." Read more

    "Liked the fact that everything went together with ease and cord was long enough for many locations...." Read more

    "Was fairly easy. One hole to drill, then it’s plugging it together." Read more

    "...for my 2018 Silverado 1500 and it plugged right up to my factory wiring and didn't require any wire splicing...." Read more

    200 customers mention189 positive11 negative

    Customers are satisfied with the quality of the auto accessory. They mention that it is a great product, easy to install, and works well. The instructions are clear, and the product is built perfectly. Some say that it works perfectly with their fifth wheel and is plug-in play. Overall, most are happy with their purchase and recommend it to others.

    "Works perfectly when installing a gooseneck in my truck. Easily installed. Looks nice and fits good." Read more

    "...Good Quality otherwise." Read more

    "Works great" Read more

    "...Easy to install and works great!" Read more

    69 customers mention52 positive17 negative

    Customers like the fit of the auto accessory. For example, they say the wiring harness is a perfect fit, the depth of the receptacle fits nearly perfect, and it has a nice low profile that fits nicely in a small space. Customers are also impresseded with the length of the wires and the cord, saying it's just about spot on.

    "...Easily installed. Looks nice and fits good." Read more

    "Perfect fit. Good durability. Easy to install" Read more

    "...The connector fit the factory harness perfectly and It included plenty of zip-ties. And the price on Amazon was much lower than I found anywhere else." Read more

    "...to get kit with 90 degree plug on bed end or it will be too long to fit in fender housing. FYI" Read more

    22 customers mention22 positive0 negative

    Customers are satisfied with the appearance of the auto accessory. They mention it looks good, is easy to install, and has a professional look. Some say that the product is first-class and is 1/3 the cost of a pro installation.

    "...Easily installed. Looks nice and fits good." Read more

    "...Result was very professional at 1/3 the cost of a professional install." Read more

    "...cable from hanging outside of the truck bed while traveling and keeps it nice & neat...." Read more

    "...wet together fairly easily and after a handful of zippies it all looks pretty and will hopefully survive many Michigan winters." Read more

    21 customers mention21 positive0 negative

    Customers are satisfied with the value of the auto accessory. They mention that it is well worth the price, inexpensive, and easy to install. Some say that the price on Amazon was much lower than anywhere else. Overall, customers are happy with their purchase and recommend it to others.

    "...And the price on Amazon was much lower than I found anywhere else." Read more

    "...So easy, so worth it! 10/10 recommend and will buy again for my next vehicle!" Read more

    "...It was well worth the price for me." Read more

    "It was easy to install, took 20 min, and worked well. Worth the money as it would of cost double at a dealership." Read more

    25 customers mention16 positive9 negative

    Customers have mixed opinions about the cord. Some say it's a perfect wiring harness, with enough cord to go almost anywhere. However, others say that the second harness had the wrong connector installed, and the trailer wire plugs in port but is loose.

    "...the fact that everything went together with ease and cord was long enough for many locations...." Read more

    "The wiring harness seems like a good product, but the installation kit needs improvement...." Read more

    "No wire for back up lights" Read more

    "I put this in my 2012 F350 and it works perfect. It came with plenty of wiring to put anywhere in the back area of the truck bed but as a note, be..." Read more

    Highly recommend this product!
    5 Stars
    Highly recommend this product!
    I bought this for my 2018 Silverado 1500 and it plugged right up to my factory wiring and didn't require any wire splicing. I would highly recommend this product if you are needing to install a trailer plug in the bed of your truck. You do have to drill a hole out in the bed of the truck but the instructions tell you exactly what size drill bit that your need. Easy to install and works great!
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    Top reviews from the United States

    Reviewed in the United States on November 2, 2023
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    Customer image
    5.0 out of 5 stars Highly recommend this product!
    Reviewed in the United States on May 21, 2023
    I bought this for my 2018 Silverado 1500 and it plugged right up to my factory wiring and didn't require any wire splicing. I would highly recommend this product if you are needing to install a trailer plug in the bed of your truck. You do have to drill a hole out in the bed of the truck but the instructions tell you exactly what size drill bit that your need. Easy to install and works great!
    Images in this review
    Customer image
    Customer image
    Reviewed in the United States on June 28, 2023
    One person found this helpful
    Report
    Reviewed in the United States on August 23, 2023
    Reviewed in the United States on February 28, 2024

    Top reviews from other countries

    BrgnHntr
    5.0 out of 5 stars Does The Trick!
    Reviewed in Canada on December 28, 2021
    One person found this helpful
    Report
    ePhoenix
    5.0 out of 5 stars Easy to install and fits perfectly well my 2016 RAM 1500.
    Reviewed in Canada on September 28, 2022
    Customer image
    ePhoenix
    5.0 out of 5 stars Easy to install and fits perfectly well my 2016 RAM 1500.
    Reviewed in Canada on September 28, 2022
    Quick plug'n'play adapters that only need a few feet of electrical tape to secure connexions. I installed a 12 volt and USB outlet while I was at it and it took me an hour an a half to complete the project.
    Images in this review
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    Customer image
    Steven Leighton
    4.0 out of 5 stars Seems good
    Reviewed in Canada on March 20, 2023
    Dad
    5.0 out of 5 stars Arrived early
    Reviewed in Canada on March 24, 2017
    Hayden
    5.0 out of 5 stars Easy install
    Reviewed in Canada on August 16, 2021