Best 4 Way Flat in 2022 [*Top Picks*]

Looking for the best 4 way flat on the market? We’ve got you covered. Check out our ratings of absolute bestsellers below and make a final decision.

8328 Reviews Scanned

  • CURT 58050 Vehicle-Side and Trailer-Side 4-Pin Flat Wiring Harness with 72-Inch Wires
    Bestseller #1
    CURT 58050 Vehicle-Side and Trailer-Side 4-Pin Flat Wiring Harness with 72-Inch Wires (386)
      EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of these vehicle-trailer connectors. They feature tabs on the top and bottom for a better grip when plugging in or unplugging RELIABLE CONNECTION. These 4-pin trailer wiring plugs come ready to splice into your existing vehicle and trailer wiring. They have 16-gauge wires and can be used to connect the taillights, brake lights and turn signals VERSATILE DESIGN. These vehicle-trailer connectors make great replacement 4-flat wiring plugs and sockets. The 4-pin wiring design matches industry-standard 4-way flat connectors and is compatible with a wide variety of trailers DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of these 4-pin trailer wiring plugs is made from durable black molded rubber that will never rust or corrode READY TO INSTALL. Equipped with color-coded wires, these 4-prong trailer wiring connectors come ready to install. The 72-inch wire loop provides plenty of extra length for a flexible installation
  • CURT 58030 Trailer-Side 4-Pin Flat Wiring Harness with 12-Inch Wires
    Bestseller #1
    CURT 58030 Trailer-Side 4-Pin Flat Wiring Harness with 12-Inch Wires (386)
      EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this trailer plug. It features tabs on the top and bottom for a better grip when plugging into your vehicle or unplugging RELIABLE CONNECTION. This 4-pin trailer wiring plug comes ready to splice into your existing trailer wiring. It has 16-gauge wires and can be used to connect the taillights, brake lights and turn signals VERSATILE DESIGN. This trailer connector makes a great replacement 4-flat trailer wiring connector. The 4-pin wiring design matches industry-standard 4-way flat sockets and can be used on a wide variety of trailers DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this 4-pin trailer wiring plug is made from durable black molded rubber that will never rust or corrode READY TO INSTALL. Equipped with blunt-cut, color-coded wires, this 4-prong trailer wiring plug comes ready to install. The 12-inch wire lead provides extra length for an easy installation
  • CURT 58380 Vehicle-Side and Trailer-Side 4-Pin Flat Wiring Harness with 12-Inch Wires
    Bestseller #1
    CURT 58380 Vehicle-Side and Trailer-Side 4-Pin Flat Wiring Harness with 12-Inch Wires (386)
      EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of these vehicle-trailer connectors. They feature tabs on the top and bottom for a better grip when plugging in or unplugging RELIABLE CONNECTION. These 4-pin trailer wiring plugs come ready to splice into your existing vehicle and trailer wiring. They have 16-gauge wires and can be used to connect the taillights, brake lights and turn signals VERSATILE DESIGN. These vehicle-trailer connectors make great replacement 4-flat wiring plugs and sockets. The 4-pin wiring design matches industry-standard 4-way flat connectors and is compatible with a wide variety of trailers DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of these 4-pin trailer wiring plugs is made from durable black molded rubber that will never rust or corrode READY TO INSTALL. Equipped with color-coded wires, these 4-prong trailer wiring connectors come ready to install. The 12-inch wire loop provides extra length for an easy installation
  • OPT7 Weatherproof 7 Way Flat Blade to 4 Way Pin Adapter w/Secure Tab - for Trailer Tow Hitch and Redline Tailgate LED
    Bestseller #1
    OPT7 Weatherproof 7 Way Flat Blade to 4 Way Pin Adapter w/Secure Tab - for Trailer Tow Hitch and Redline Tailgate LED (433)
      The STRONGEST BEASTS ADAPT: Give your rig the ability to light up any trailer, camper, or accessory STAYS ON TIGHT: Use your 7-pin dust cover to secure your adapter in place. It WILL NOT fall off READY FOR ANY SITUATION: Sealed weatherproof construction with rust resistant prongs and cap cover PERFECT FOR UHAUL, trailers, 5th wheel, and any auxillery lighting FULLY COVERED by our free 90 Days warranty, offered only by OPT7
  • MICTUNING Universal 4 Way Flat Y-Splitter Plug and Play Adapter Extension Harness for LED Tailgate Light Bar and Trailer Lights
    Bestseller #1
    MICTUNING Universal 4 Way Flat Y-Splitter Plug and Play Adapter Extension Harness for LED Tailgate Light Bar and Trailer Lights (743)
      * 2-Way Y-Splitter Harness, Special Design to Fit For Trailer LED Lights, Tailgate Light Bars and Other Use * 17.5" Long Wiring Harness with 9" of each Male Flat 4 Pin Connector and 2 Female Flat 4 Pin Connectors * Premium Insulating Silicone Housing, Worry-free About Wiring Safety, Super Flexible and Durable * Play-N-Play, Fits ALL Types of Trailers, Helping to Extend Your Original One Without Splicing New Wires * What You Get: 1x 4 Pin Trailer Y-Splitter, Free Lifetime Technical Support, Plus Friendly Aftermarket Services
  • MICTUNING 4-Way Flat to 7-Way Round Blade Trailer Adapter Wiring Plug Connector with Mounting Bracket
    Bestseller #1
    MICTUNING 4-Way Flat to 7-Way Round Blade Trailer Adapter Wiring Plug Connector with Mounting Bracket (1326)
      Make the Wiring Easier - Plug and play, convert the car's 4-pin flat socket to the 7-pin blade round socket for the trailer, synchronize the trailer's signal light, and customize the plug-in wiring system to connect the trailer, which is very convenient and solves the trouble of rewiring every time High-quality Manufacturing - Using pure copper as the inner core, greatly improves the electrical conductivity. With the high-quality PVC shell, wear-resistant, corrosion-resistant, effectively waterproof and long service life Provide Extra Protection - With the spring-loaded cover, high dust-proof, to avoid the adapter damage from the external environment when it is not in use Simple to Install - Equipped with mounting bracket, screws, and nuts, just find the right position to install and tighten the nut to install successfully Wide Application - Applicable to all towing vehicles that don't require electric brakes, including trailers, semi-trailers, RVs, etc
  • YONHAN 4 Pin to 7 Pin Adapter Trailer Light Adapter 4-Way Flat Truck to 7-Way Blade Reverse Plug Connector with Mounting Bracket for Towing Solutions
    Bestseller #1
    YONHAN 4 Pin to 7 Pin Adapter Trailer Light Adapter 4-Way Flat Truck to 7-Way Blade Reverse Plug Connector with Mounting Bracket for Towing Solutions (721)
      Easy to Use: Converts 4 pin flat truck connector to a standard 7 pin RV blade socket, connects tail reverse turn signals, synchronizes the trailer's signal light, no splicing of wires needed, plug and play, easy to create custom plug-in wiring systems for towing solutions. High Quality: The 4 7 trailer adapter uses extremely durable ABS plastic construction instead of PVC, improving the corrosion resistance, oxidation resistance, and high-temperature resistance. The inner core is made of pure copper, which dramatically enhances the conductive performance. Dust & Water Proof: The trailer light adapter is Well-sealed spring-loaded keeps out dust and water when not in use, and prolongs its use life. Applicable to all towing vehicles that don't require electric brakes, including trailers, semi-trailers, RVs, etc Simple Installation: The 4 way to 7 way trailer adapter comes with a mounting bracket and hardware, conveniently connect the trailer wiring adapter to your trailer hitch or bumper. What You Get: 1 * 4 Way Flat to 7 Way Blade Trailer Light Adapter with Mounting Bracket, using manual. If you have any questions, don't hesitate to contact us!
  • CURT 58301 Vehicle-Side Trailer Wiring Harness Mounting Bracket for 4-Way Flat
    Bestseller #1
    CURT 58301 Vehicle-Side Trailer Wiring Harness Mounting Bracket for 4-Way Flat (386)
      STANDARD FIT. This trailer wiring mounting bracket is designed to securely mount virtually any industry-standard 4-way flat connector FLEXIBLE MOUNTING. The bracket features a simply friction fit design to accept a variety of trailer wiring harnesses. It allows you to mount the wiring harness onto your vehicle or trailer hitch, whichever is most convenient HIGH-STRENGTH. This trailer wiring harness bracket is made from solid steel to provide plenty of strength for a solid mount and to remain fixed in spite of vibrations while towing. The steel body will not crack like plastic alternatives CORROSION-RESISTANT. To face the weather and elements with ease, this trailer wiring bracket is covered in a black powder coat finish, helping to resist rust for long-lasting strength EASY TO INSTALL. To install this mounting bracket for vehicle-trailer wiring, you can bolt it directly onto your vehicle using the top screw holes, or you can pair this bracket with the CURT #57204 for a convenient, no-drill, tube clamp mount
  • Oyviny Custom 4 Way Flat Trailer Wiring Harness for Nissan Frontier 2005-2022/Nissan Xterra 2005-2015/Nissan Pathfinder 2005-2010/Suzuki Equator 2009-2012, Factory Tow Package Required
    Bestseller #1
    Oyviny Custom 4 Way Flat Trailer Wiring Harness for Nissan Frontier 2005-2022/Nissan Xterra 2005-2015/Nissan Pathfinder 2005-2010/Suzuki Equator 2009-2012, Factory Tow Package Required (178)
      ‚ě§Vehicle-Specific Trailer Harness. This 4 pin trailer wiring harness fits for 2005-2022 of the Nissan Frontier, Pathfinder, Xterra and Suzuki Equator, perfect for replacing damaged OEM wiring harness ‚ě§Standard¬†4¬†Way¬†Plug. Custom fit trailer hitch wiring¬†provides¬†a¬†4-way¬†flat¬†trailer¬†connector¬†to¬†power¬†your¬†trailer's¬†signal¬†lights.¬†Note: This Xterra/Frontier trailer harness is a perfect replacement for vehicles already has tow package, it will give you running lights, brake lights and turn signals. If your vehicle doesn't have a tow package, you won't get running lights on trailer, you need to get the relays from the dealers so that running lights will work ‚ě§Well Protected. The whole aftermarket trailer wiring harness are protected by black nylon wire loom to keep them bundled together and well protected, ensure long service life. 70 inches long wire offers plenty of flexibility for towing ‚ě§Easy Installation. Simple Plug and Play design makes easy installation, No Cutting or Splicing Required! Directly plug the custom connector into the existing factory harness on your Nissan vehicle ‚ě§Durable Construction. Corrosion-resistant 4 pin connector is easy to grip, equipped with a rubber dust cover to protect the socket from water and dust when not in use, premium tin-plated copper terminals makes great conductivity
  • 4-way Flat Trailer Connector with Snap Self-Closing Lid Cover Heavy-Duty 12V 4-pin Trailer Tow Wire Harness Socket Kit with 7.8
    Bestseller #1
    4-way Flat Trailer Connector with Snap Self-Closing Lid Cover Heavy-Duty 12V 4-pin Trailer Tow Wire Harness Socket Kit with 7.8" Wires Road Tough WeatherLock (23)
      READY-TO-INSTALL kit includes 4-pin socket, 200 mm/7.8-inch pigtail, mounting bracket and hardware WeatherLock's 100% WATERTIGHT construction keeps water and dirt out per IPX7 and IPX9K DURABLE FiberCore composite construction is mechanically strong and UV-resistant HIGH-QUALITY plated contacts ensure many years of use 100% meets SAE J1239 testing and performance requirements
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