Manufacturer | CURT |
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Brand | CURT |
Model | Wiring Extension |
Item Weight | 2.2 pounds |
Product Dimensions | 8.7 x 8.2 x 4.1 inches |
Item model number | 56070 |
Is Discontinued By Manufacturer | No |
Manufacturer Part Number | 56070 |
OEM Part Number | 56070 |
Wattage | 3 |
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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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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
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.
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
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Two types of trailer wiringCURT 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 harnessesA 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 connectorsA 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-specificEach 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. |
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)
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Minimum heat generationThe 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 intensitySMT is manufactured with automated processes for maximum consistency and the highly efficient circuitry promotes optimum intensity and life for the trailer light. |
Durable performanceSurface 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
ASIN | B0031GHBSE |
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Customer Reviews |
4.8 out of 5 stars |
Best Sellers Rank | #15,507 in Automotive (See Top 100 in Automotive) #32 in Automotive Replacement Electrical Wiring Harnesses |
Date First Available | October 10, 2007 |
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers 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
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
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
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
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
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
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
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Top reviews from the United States
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Reviewed in the United States on May 21, 2023
Top reviews from other countries
But other than that, you just slide the wire harness down through the hole, find a route to the bumper connector, unplug it, plug this in, zip-tie it up and it's done. It was a lot simpler than I anticipated. On my 2020 Ram 2500 I lowered the spare tire just to have more room to move, and see clearly, but that may not be necessary on all trucks.
Anyway, if you don't want your fifth wheel cable dangling outside the truck while you drive potentially scratching cup your tailgate, or worse, getting caught up in something, I highly recommend this Curt Extension. Everything you need (except the drill) is in the box!
Reviewed in Canada on September 28, 2022
Ordered it again for the 2021. Fit same as before. Quick and easy install again.