4 Wire Trailer Wiring Diagram Top 10 Reviewed & Rated

4 Wire Trailer Wiring Diagram

Bestseller No. 1
SUZCO 25 Foot 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, 4-Way Plug 4 Pin Male & Female Extension Connector & Wishbone-Style with 18 Gauge White Ground Wire with SAE J1128
1,378 Reviews
SUZCO 25 Foot 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, 4-Way Plug 4 Pin Male & Female Extension Connector & Wishbone-Style with 18 Gauge White Ground Wire with SAE J1128
  • 【ITEM TYPE】This is a 25 foot male & female 4-flat marine trailer wiring harness with 4-way conductors and a white ground wire, made of 18-gauge wire, designed to split at the trailer tongue and run down each side of the trailer. The 4 flat trailer wire is color-coded and bonded wire to easily splice into your trailer's wiring system, no need for splicing wires. This trailer wire harness kit is completely sealed for a long corrosion-resistant installation.
  • 【EXTENSION INCLUDING】This 25foot 4 wire boat trailer wiring extension can conform to the SAE J1128 specification. Extends wiring system provides more flexibility. It can protect tow vehicle electronics from wiring shorts. Includes a 4-feet trunk connector, splices, and clips. This trailer wire harness kit also can work on an aluminum trailer based on the ground wire.
  • 【ENOUGH LENGHT GROUND WIRE】This trailer wire extension with 4 way flat plug connector is designed to supply power for tail lights, turn and brake lights, as well as a ground connection. The white grounding wire is so enough long to wiring. The trailer side ground wire is about 2ft. Trailer wiring harness features a ground wire. The white ground wire is made of 18-gauge, which is corrosion resistant terminal.
  • 【4-WAY CONNECTORS & FITMENT】You can install the trailer wire so quickly and easily through the 4-way connectors. 4-pin connectors are available allowing the basic hookup of the three lighting functions (running, turn, and brake lights) plus one pin is provided for a ground wire. Most standard light duty trailers will use a 4-pole flat connector. Not compatible with motorcycle trailer wiring, and you could confirm the fitment to be not the wrong item before ordering.
  • 【4 WIRING INSTRUCTION】There are instructions for wiring the running light and license plate lights included. The different color wires are clearly identified as each wire's function, so you can make the installation safe and straight-forward.
Bestseller No. 2
CURT 57672 Dual-Output 4-Way Flat Vehicle-Side to 7-Way RV Blade Trailer Wiring Adapter
  • VERSATILE DESIGN. This dual-output trailer wiring adapter makes it easy to tow different trailers with your vehicle, equipping it with a standard 7-way RV blade socket while retaining use of the existing 4-way flat wiring
  • WEATHER-RESISTANT. This trailer wiring harness adapter comes with dust covers for the 4-pin and 7-pin wiring sockets 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 dual-output 4-pin to 7-pin trailer adapter wiring comes ready to plug into your vehicle or trailer wiring with minimal splicing required. It also includes a mounting bracket for convenient attachment to your hitch or bumper
  • 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
Bestseller No. 3
ABN Trailer Wire Extension, 8ft, 4-Way 4-Pin Plug Flat 20 Gauge – Hitch Light Trailer Wiring Harness Extender
  • EFFORTLESS TRAILER WIRING: Use the ABN Trailer Wire Extension, 8’ Foot, 4-Way 4-Pin Plug Flat 20 Gauge – Hitch Light Trailer Wiring Harness Extender to extend current truck to trailer wires
  • VARIOUS APPLICATIONS: 4-way standard flat light connector with trailer ends; For all types of trailers including marine boat trailer, horse trailer, motorcycle trailer, ATV trailer, and other cargo utility trailer hitches (tow/haul vehicle must have 4-way plug)
  • BUILT TO LAST: Heavy-duty 20-gauge wires for strength and longevity; Color-coded for your convenience
  • NO SPLICING: No need to splice your new wires, simply extend them with this extender
  • PACKAGE CONTENTS: Package includes (1) 8-foot (2.4m) extension for your convenience
Bestseller No. 4
MICTUNING Heavy Duty 7 Way Plug Inline Trailer Cord with 7 Gang Junction Box - 8 Feet, Weatherproof
3,093 Reviews
MICTUNING Heavy Duty 7 Way Plug Inline Trailer Cord with 7 Gang Junction Box - 8 Feet, Weatherproof
  • TIDY YOUR WIRE HARNESS - 7-way copper blade molded into a heavy duty plug, provides a fast and simplified way for wires connection as well as keeping all your trailer wiring in order.Cautions: Pls read the plug diagram carefully and refer to the diagram to install this 7 way plug.
  • CONVENIENT TRAILER WIRING - sturdy junction box with color marked 7-poles that can be easily identified, gives you more convenience for wiring left/right turn light, brake signal lamp, reverse light, tail light, etc.
  • EXCELLENT CONSTRUCTION - adopted flameproof ABS junction box and good conductivity copper with solid cord, stronger and rugged, perfect for RVs, trailers, campers, caravans, food vans and other towed vehicles.
  • FLEXIBLE CONNECTION - 8FT long cord with soft and durable PVC housing that offers you plenty of flexibility to wire it from the front to the rear of your car.NOT LIKE OTHERS, ONLY 4FT OR 6FT.
  • BEST SEALING PERFORMANCE - 4 open & 4 close rubber fitted grommets for option based on your wiring needs, making the whole junction box waterproof, dustproof and corrosion resistant. WHAT YOU'LL GET:2 Year MICTUNING WARRANTY and lifetime best customer service, 1 x 7-Way Trailer Plug with Junction Box, 4x Open Grommets, 4x Close Grommets.
Bestseller No. 5
7-Way Trailer Plug Connector Cord 7-Pin: USA Business Extra Long 10 Ft, Heavy Duty, Weatherproof, Corrosion Resistant, Double Prongs, RV 7 Pin Wire Inline Light Trailer Wiring Harness Cable
  • SPECS : 10 Ft Long Cord / 7 Way Copper Spade Double Prongs Connectors molded into a Heavy Duty Plug Head / AWG COPPER 2/10-1/12-4/14 / !PLEASE NOTE! actual wiring color codes are matching the RV Standard but some trailers wiring color codes may vary!
  • FEATURES: Weather Resistant, Wires are Coated with a Thick Rubber-like Insulation, offering Kink-Free Flexibility / Quick and Easy Installation Into a Junction Box
  • WARRANTY: 30 Days Refund - 24 Months Exchange. PWR+ is WA, USA based company. We are friendly Customer Support Experts
  • SAFETY: Pwr+ chargers and cords manufactured with the highest quality materials and include multiple smart features safeguarding against IV - incorrect voltage, SC - short circuit, IO - internal overheating. CE/FCC/RoHS certified.
  • USABILITY: Solid Rugged Cord is Perfect for RVs, Trailers, Campers, Caravans, Trucks, Food Vans and other Towed Vehicles
Bestseller No. 6
HOB4U 4-Way Flat to 7-Way Round Blade Trailer Adapter Wiring Plug Connector with Mounting Bracket for Towing Solutions
107 Reviews
HOB4U 4-Way Flat to 7-Way Round Blade Trailer Adapter Wiring Plug Connector with Mounting Bracket for Towing Solutions
  • Converts your vehicle's 4-way flat trailer connector to a 7-way, RV-style connector, voltage range: 6-24 Volts
  • Extremely durable ABS plastic construction, weatherproof and corrosion resistance
  • Wiring harness plugs into existing 4-way flat connector and hardware to existing wiring
  • Works on most vehicle wiring component like turn signals, brakes and auxiliary power
  • Simple installation: All necessary mounting bracket and screws+nuts included
Bestseller No. 7
Hopkins 47185 Multi-Tow 4 Flat to 7 Blade and 4 Flat Adapter
  • Multi-Tow adapters provide two towing options from one vehicle-end connector creating a true customized wiring system
  • Multi-Tow 7:4
  • 4 wire flat to 4 wire flat and 7 RV round adapter
  • Allows the user to create custom plug-in wiring systems for any towing situation
  • Take the guesswork and frustration out of vehicle to trailer wiring
Bestseller No. 8
CARROFIX LED Compatible Taillight Converter with 20" Inches Leads and 60" Inches 4-Wire Flat Extension Vehicle End Connector
  • WHAT WE SELL? - A universal taillight converter with 60" 4-flat plug extension and 20" leads; Adapts vehicles with separate turn and stop lights (3-wire system) to standard trailer taillight wiring (2-wire system); Powers up to 2.1 amps per output
  • WHAT MAKES IT DIFFERENCE? - This electronic tail light converter is compatible with vehicles and trailers that have either LED/Incandescent bulbs; Does not affect the functionality of the existing lights
  • WHAT ARE THE FEATURES? - Dust cover included to keep connector clean when not in use; Double bolted & weatherproof design has corrosion resistant terminals to ensure durability; A heavy-duty flasher may be needed to eliminate rapid flashing
  • WIRE CONFIGURATION: Color-coded wires for faster and easier installation, the white is for ground, the green is for R/turn signal, the yellow for L/turn signal, the red for brake, and the brown is for tail lights
  • BUY WITH CONFIDENCE: We highly value customer experience and satisfaction. You are welcome to actively share your opinions for this NEWLY RELEASED converter. We support MONEY BACK GUARANTEE and One Year Warranty, if you're not 100% satisfied for any reason, get your money back
Bestseller No. 9
807 4 pin Flat/Square Trailer Connector,Trailer Side 4-Way Trailer Wiring Harness with 12-Inch Wires, 4-Pin Trailer Wiring(4 Way Flat Plug)
  • 【EASY GRIP】 With 807 4 Pin Trailer Plug,4 Pole Flat Trailer Plug, Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of these vehicle-trailer connectors. They feature a tab on top for a better grip when plugging in or unplugging.
  • 【RELIABLE CONNECTION】 These 4 Way TRAILER CONNECTOR,4-pin trailer wiring plugs come ready to splice into your existing vehicle and trailer wiring. They can be used to connect the taillights, brake lights and turn signals.
  • 【WIDLY COMPATIBLE】Universal 4 Way Flat Extension Harness for LED Tailgate Light Bar and Trailer Lights,is universal for all trailers and all tow or haul vehicles with a 4-way plug.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.
  • 【BUILT TO LAST】 4 Way Flat Trailer Light Wiring Plug Adapters LED Strip Brake Turn Signal Tailgate Light Bar Universal Plug & Play Adapter Extension Harness are color-coded for your convenience, and with this 36inch long extender, there is no need for splicing wires.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.
  • 【EASY INSTALL】 Equipped with color-coded wires, these 4-prong trailer wiring connectors come ready to install.Double ended 4 way with trailer ends for easy universal connection and installation. The 36-inch wire loop provides plenty of extra length for an easy, flexible installation.
SaleBestseller No. 10
ABN 7 Pin Trailer Wiring Harness Plug Inline Trailer Cord - Roj Plug Trailer Cord with 7 Gang Junction Box and 4ft Cord
  • [Effortless Trailer Wiring Kit]: Remove the guesswork when wiring your trailer to your vehicle with the ABN ROJ Adapter Trailer Plug 7 Way Trailer Wire Pigtail Inline Trailer Cord; Run your electric light signals to your camper and trailer for safe traveling
  • [Use All Year Round]: Trailer wire harness casing offers weather resistance from 40-degrees Fahrenheit (105°C) dry and 15-degrees Fahrenheit (60°C) wet; 7 pin trailer plug light wire kit is perfect for RVs, trailers, campers, caravans, trucks, food vans, and other towed vehicles
  • [Replace Your Old Trailer Junction Box]: Each 7 pin trailer connector features identifiable markings and different colored to allow for simple and secure installation of RV and towing hook up
  • [Color-Coded for Quick Installation] 7 gang trailer box features color-coded studs to connect your ground wire (white), 12V charge line/aux cord (black), reverse lights (yellow), left stop and turn lights (red), right stop and turn lights (brown), tail lights (green), and electric brake lights (blue)
  • [Built to Last]: 30 Mil AWG Copper wiring with 2/10-1/12-4/14-gauge wires have a flexible plastic casing that resists weather and moisture; 4-foot (1.2m) extension includes length of the wire and junction box

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Last update on 2021-05-18 / Affiliate links / Images from Amazon Product Advertising API

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