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CURT 57184 4-Way Flat Vehicle-Side to 7-Way RV Blade Trailer Wiring Adapter, Black

4.6 4.6 out of 5 stars 385 ratings

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Purchase options and add-ons

  • VERSATILE DESIGN. This trailer wiring adapter makes it easy to connect a mismatched vehicle socket and trailer plug, adapting your 4-way flat connector into a standard 7-way RV blade socket
  • WEATHER-RESISTANT. This trailer wiring harness adapter comes with a spring-loaded dust cover for the 7-pin wiring socket to protect the terminals from water, dirt and corrosion. The wiring harness is also well-protected with the included slit loom sleeve
  • STANDARD CONNECTION. This trailer hitch wiring adapter plugs into any standard 4-way flat and can be used to connect the taillights, brake lights, turn signals, reverse lights, trailer brakes and auxiliary power (some splicing required)
  • EASY TO INSTALL. This 4-pin to 7-pin trailer adapter wiring comes ready to plug into your vehicle or trailer wiring with minimal splicing required
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this trailer harness adapter is made from durable black plastic that will never rust or corrode
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CURT 57184 4-Way Flat Vehicle-Side to 7-Way RV Blade Trailer Wiring Adapter, Black
CURT 57184 4-Way Flat Vehicle-Side to 7-Way RV Blade Trailer Wiring Adapter, Black
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Price-41% $15.99
List:$26.95
-6% $16.90
Typical:$17.99
$14.99$32.86$36.47$13.57
Delivery
Get it as soon as Tuesday, Mar 19
Get it as soon as Tuesday, Mar 19
Get it as soon as Tuesday, Mar 19
Get it Oct 4 - 9
Get it as soon as Tuesday, Mar 19
Get it as soon as Tuesday, Mar 19
Customer Ratings
Value for money
4.0
4.7
4.7
4.2
3.6
4.4
Easy to install
4.5
4.7
4.7
4.7
4.8
Easy to use
3.8
4.6
4.7
4.7
4.7
Sturdiness
4.7
4.3
4.4
4.3
3.8
Sold By
Covestco LLC
MICTUNING® Direct
YONHAN
Amazon Global Store UK
Amazon.com
Wadoy Direct

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Top Brand: CURT

Highly Rated
4.6/5 star rating from 100K+ customer ratings
Trending
100K+ orders for this brand in past 3 months
Low Returns
Customers usually keep items from this brand

From the manufacturer

CURT Towing Accessories

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 Trailer Hitches Camper RV Jeep Towing

Towing accessories to fit your lifestyle

Hitches, trailer wiring, cargo carriers and more!

CURT offers a complete line of towing accessories to let you fully enjoy your passion!

With everything from custom trailer hitches and trailer wiring to 5th wheel hitches and cargo carriers, we have the towing equipment you need to make the most of each adventure.

Whether you're working, playing or doing a little of both, CURT towing products enable you and your crew to make memories that will last a lifetime.

A complete line of towing products

  • Trailer hitches
  • 5th wheel hitches
  • Gooseneck hitches
  • Towing electrical
  • Towing accessories
  • Weight distribution
  • Trailer parts and accessories
  • Cargo management

Basic towing components

CURT Trailer Hitch Towing Accessories Ball Mount

CURT Custom Trailer Wiring Harness Hitch Receiver

CURT Ball Hitch Mount Towing Accessories

CURT Hitch Cargo Carrier Cargo Net

Custom hitches

A trailer hitch receiver is the starting point for most people looking to tow with their vehicle. CURT offers over 1,000 different custom hitch models to provide a perfect, factory-like fit on most vehicles on the road today. Our custom hitches provide a standard hitch receiver to mount a variety of towing accessories.

Vehicle-trailer wiring

The next step in equipping your vehicle for towing is to add a trailer wiring harness. Like our hitches, CURT custom wiring is made vehicle-specific for each make and model. Virtually all of our custom vehicle-trailer wiring harnesses install using existing factory connectors on the vehicle for a plug-and-play connection. No splicing necessary!

Ball mounts

With a custom trailer hitch receiver installed on your vehicle, a variety of ball mount options can be installed as needed. We offer loaded ball mounts with a trailer ball already torqued in place, as well as adjustable ball mounts, multi-ball mounts, tow hooks and more. A ball mount can be secured into the receiver using one of our hitch pins or hitch locks.

Cargo management

To add cargo space to your vehicle, CURT offers a number of cargo management accessories. Our cargo carriers are available in a convenient, use-as-needed hitch-mounted design, as well as a roof rack option. We also offer bike racks, cargo bags, cargo nets and ratchet straps for additional item security.

Heavy-duty towing equipment

CURT 5th Wheel Hitch Truck Bed Towing

CURT Gooseneck Hitch OEM Puck System Truck Bed

CURT Echo Mobile Electric Trailer Brake Controller Smartphone

5th wheel hitches

For heavy-duty towing of an RV or travel trailer with your pickup truck, CURT has a wide array of 5th wheel hitch options. 5th wheel hitches are available in capacities up to 25,000 lbs. and in various series, each with own unique set of features and benefits. To install a 5th wheel hitch in your pickup truck bed, CURT offers traditional 5th wheel rails and brackets, as well as puck system options and gooseneck adapters.

Gooseneck hitches

For towing heavy-duty trailers around the farm or out to the construction site, CURT gooseneck hitches are a highly dependable extension of your truck. We offer puck system gooseneck hitch kits to accommodate trucks with the factory towing prep package. We also offer original-equipment-style gooseneck hitches for select applications, as well as traditional gooseneck hitches and brackets, such as our original Double Lock.

Trailer brake controllers

CURT offers several different electrical trailer brake controller options to perfectly suit your towing setup and lifestyle. Our Echo mobile trailer brake controller is particularly unique, featuring a Bluetooth connection that links to your smartphone and provides highly responsive braking with your Apple or Android device as the interface. It easily plugs in with no tools or extra wires needed. We also offer our factory-like Spectrum and traditional TriFlex.

Specialized towing accessories

CURT Trailer Hitch Adjustable Channel Mount

CURT Weight Distribution Hitch Trailer Sway Control

CURT Pintle Hitch Mount Lunette Ring

CURT Cargo Ratchet Straps Trailer Truck Towing

Adjustable channel mounts

To give your vehicle greater capability for towing a variety of trailers, CURT adjustable trailer hitch ball mounts provide the answer. This versatile ball hitch comes in standard hitch receiver sizes and provides flexible vertical adjustment to ensure level towing, even with large, lifted trucks and SUVs.

Weight distribution hitches

Give yourself more control over your vehicle and trailer with a CURT weight distribution hitch. This receiver hitch attachment helps level the vehicle-trailer combination for a smoother ride. Our TruTrack weight distribution hitch is particularly unique, featuring integrated trailer sway control.

Pintle hitches

These heavy-duty hitches are perfect for agriculture, construction and military towing. We offer pintle hitches, pintle hooks, ball and pintle hitch combinations, as well as channel-mount pintle hitches for an adjustable option. We also carry high-strength lunette rings for a solid connection to the trailer.

Ratchet straps

Keep your cargo fully secure in your truck bed or trailer with a set of CURT ratchet straps. These cargo tie-down straps come with heavy-duty ratcheting mechanisms and are available in wide variety of capacities, lengths, hook types and colors.

Product Description

There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system. Some trailers only need the bare essentials -- running lights, brake lights and turn signals -- while others require a connection for reverse lights, electric brakes and auxiliary power. With connectors ranging from simple to complex, it may be the case that the connection between your vehicle and your trailer is not a perfect match. For example, your truck may be equipped with a 6-way round socket, but your trailer may have a 4-way flat plug. For this very common problem, CURT offers a quick and simple solution in the form of an electrical adapter. An adapter is an electrical device that allows a connection to be made between a mismatched trailer plug and vehicle socket. It easily plugs in your vehicle's electrical socket and usually requires no additional wiring. CURT offers an array of adapters to accommodate most types of plugs and sockets, including 4-way flat, 4-way round, 5-way flat, 6-way round, 7-way RV blades and more. This electrical adapter is designed to adapt a 4-way flat vehicle socket to fit a 7-way RV blade trailer plug. It is constructed from quality plastic and requires some splicing. All CURT wiring and electrical products come with a one-year limited warranty to give you the assurance you need to tow with confidence.

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 57184 4-Way Flat Vehicle-Side to 7-Way RV Blade Trailer Wiring Adapter, Black


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What's in the box

  • 1 4-WAY FLAT TO 7-WAY RV ROUND CAR END PACKAGED PLASTIC
  • Product guides and documents

    Looking for specific info?

    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    385 global ratings

    Customers say

    Customers like the performance, quality, ease of installation, value, and fit of the auto accessory. They mention that it works well, is well made, and easy to hook up. Some appreciate the fit, saying it fits perfectly into the Curt mounting bracket.

    AI-generated from the text of customer reviews

    37 customers mention31 positive6 negative

    Customers like the performance of the auto accessory. For example, they mention it works well and makes the trailer legal to tow.

    "...For doing the above, this connector - adapter works perfectly. Just know that you will have NO ELECTRIC TRAILER BRAKES when you use connecter." Read more

    "...The adapter worked exactly as expected and made the trailer legal to tow...." Read more

    "Well made and reasonably priced, does the job right." Read more

    "...The car only has a '4-way.' Worked well, but be sure to 'ground' the white cable." Read more

    23 customers mention20 positive3 negative

    Customers find the installation process of the auto accessory to be easy. For example, they mention that it is very easy to hook up and that it plugs nicely into the connector assembly.

    "Great quality and easy to install, installed this on my 67 Ford f100." Read more

    "...This CURT plugged nicely into the connector assembly...." Read more

    "I prefer Curt products because of their price, quality and ease of installation. This was no exception...." Read more

    "...This product was very easy to hook up and we were on the road camping...." Read more

    23 customers mention20 positive3 negative

    Customers like the quality of the auto accessory. They say it works well, is sturdy, and is well-made.

    "Great quality and easy to install, installed this on my 67 Ford f100." Read more

    "Well made and reasonably priced, does the job right." Read more

    "I prefer Curt products because of their price, quality and ease of installation. This was no exception...." Read more

    "Good product, poor wiring installation instructions." Read more

    9 customers mention9 positive0 negative

    Customers appreciate the value of the auto accessory. They mention that it is a great product and a perfect fit.

    "Well made and reasonably priced, does the job right." Read more

    "Great price great quality" Read more

    "good value" Read more

    "Great price, perfect fit and great quality" Read more

    8 customers mention8 positive0 negative

    Customers are satisfied with the fit of the auto accessory. They mention that it fits perfectly and works great. Some customers also mention that the adapter fits into the Curt mounting bracket perfectly.

    "Perfect! Works like a champ. Easy to install if you have a mounting bracket. Recommend you buy the bracket at the same time...." Read more

    "This product was exactly what I needed. Fits snugly on both ends and has plenty of reach...." Read more

    "Fit perfectly. Was up and working in minutes!" Read more

    "Great price, perfect fit and great quality" Read more

    Faulty & Misleading Design
    1 Star
    Faulty & Misleading Design
    The white (ground) wire coming from the 4-way plug is not connected to anything on the other end. This means that when I plugged it into the 4-way connector of my car and the 7-way connector of my new boat trailer, which only uses 4 connectors in the 7-way plug, it did not work. After much troubleshooting I discovered this foolishness. A Curt "Product Support Specialist" emailed me "With this particular wiring harness, the white ground wire coming out of the 4-flat is not used and is supposed to be cut off." Then why put it there in the first place and if it's there why hide the cut off end in the split loom? The design in quite misleading and the manufacturer is unapologetic. While this appears to be suitable as a temporary adapter between 4-way and 7-way, it is not. For this adapter to work without modification, the large white (ground) with the crimped-on ring connector must be permanently affixed to the vehicle frame.
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    Top reviews from other countries

    Greg P.
    5.0 out of 5 stars Easy to USE
    Reviewed in Canada on August 18, 2019
    Manjinder Dhaliwal
    5.0 out of 5 stars Simple, does the job
    Reviewed in Canada on October 5, 2020
    Glen E. Moore
    5.0 out of 5 stars Trailer plug
    Reviewed in Canada on July 23, 2019
    Amazon Customer
    4.0 out of 5 stars Recommend with a "make better" tip...
    Reviewed in Canada on October 3, 2017
    DY
    5.0 out of 5 stars Good to go
    Reviewed in Canada on October 9, 2022