4 Wire Trailer Wiring Diagram Top 10 Reviewed & Rated

4 Wire Trailer Wiring Diagram

Bestseller No. 1
CZC AUTO Trailer Wiring Harness Kit 4-Way Wishbone Style Y Style 18AWG Pure Copper Core Color Coded Wire with Standard 4-pin Flat Plug Connector, 4' Female and 25' Male for 12V Trailer Boat
  • PURE COPPER CORE: CZC AUTO trailer wiring harness uses superior materials, 18 gauge 100% pure copper core covered by PVC with UV, PVC plug with stain nickel plated copper terminals inside. Sealed and anti-corrosion, can be submersible for a long time. 2 years warranty supplied by CZC AUTO.
  • Y STYLE: Wishbone style designed boat trailer wire harness, 4PCS wires for 4-pin female plug and 5PCS wires for 4-flat male connector. There are 2PCS brown running wires which splite from the male plug to left and right tail lights for simple connection, no jumper wires needed. The male and female plug pin size is standard which can match different standard male or female plug together.
  • TOTAL 29FT: 4ft long wire on female plug side for vehicle and 25ft on male side for trailer lights, long enough for all kinds of 12V 4-pin connection trailers, such as over & under 80" wide boat trailer, enclosed cargo trailer, utility trailer, dump trailer, ATV trailer, equipment trailer, car hauler trailer and so on.
  • WIRE CONNECTION: Color coded wire directly match the trailer wire system for easy and safe connection. White wire for grounding, green wire for right stop&turn, yellow for left stop&turn, brown for running&license illumination(male side, brown wire which next to yellow is used for left running&license illumination, the one next to green is for right running). Please find the picture and instruction for details.
  • CLIENT SUPPORT: 30-day money-back guarantee, return your undamaged CZC AUTO product and receive a full refund for any reason. 2-years warranty for quality-related issues, we take care of all quality-related issues with a REPLACEMENT OR FULL REFUND. Please feel free to contact us at first if there is any problem when you receive or use our products. We are always here to support you.
Bestseller No. 2
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. 3
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
  • 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
Bestseller No. 4
SnowyFox 7 Way Trailer Plug Cord Junction Box - Heavy duty 7 Pin Trailer Wiring Harness Inline Cord Cable Weatherproof Corrosion Resistant, 8 feet
  • 7-way copper blade molded into a heavy duty plug, provides a fast and simplified way for wires connection. Also keeps all your trailer wiring in orders. Be attention: Pls read the plug diagram carefully First and refer to the diagram to install this 7 way plug
  • It is easily identified that sturdy junction box with color marked 7-poles, gives you more convenience for wiring left/right turn light, brake signal lamp, reverse light, tail light, etc
  • Adopted flameproof ABS junction box and good conductivity copper with solid cord, stronger and rugged. It is perfect for RVs, trailers, campers, caravans, food vans and other towed vehicles
  • 8FT long cord with soft and durable PVC housing, offers you plenty of flexibility to wire it from the front to the rear of your car
  • 4 open and 4 close rubber fitted grommets for option based on your wiring needs, making the whole junction box waterproof, dustproof and corrosion resistant
Bestseller No. 5
BougeRV 7 Way Trailer Plug Weatherproof Trailer Wiring Harness 7 Pin Trailer Connector Enclosed Trailer Accessories with Junction Box for RV Trailers, Campers, Caravans, Food Trucks (8 Feet Long)
  • BougeRV trailer plug is made from flameproof ABS junction box, good conductivity copper and solid cord.​​​​​​​ 4 open & 4 close rubber grommets makes the whole junction box weatherproof and corrosion resistant. Junction Box is much easier than managing loose wires.
  • There are several recognized wiring color code conventions on the 7-way trailer connector. Connected by function, not only by color. PLEASE FOLLOW BougeRV TRAILER WIRING DIAGRAM in DESCRIPTION or MANUAL.
  • Easy to replace damaged 7-way trailer connector plug, 8 feet length prevents it from being strained during an emergency turn. 7-Way Connects Brake, Running, Reverse, Turn Signals, and Auxiliary Power.
  • BougeRV trailer wire provides a fast, simple way to connect the wires from the trailer cord to the trailer wiring. perfect for RVs, trailers, campers, caravans, food vans and other towed vehicles.
  • What you'll get: 2 YEAR WARRANTY & Lifetime customer service. If you have any concerns or questions, please get in contact with BougeRV customer service.
Bestseller No. 6
RVMATE 7 Way 8 Feet Trailer Cord Kit,Include 12V Breakaway Switch and Plug Holder, Trailer Connector Cable Wiring Harness with Waterproof Junction Box
  • PRACTICAL TRAILER CORD SET: This set includes a 7-way trailer cord with junction box- 8 feet for your trailer wiring, a 12v breakaway switch for safer towing by connecting your vehicle to your trailer's breakaway battery and trailer brakes, and a plastic trailer plug holder that keeps the plug from dragging on the ground
  • CONVENIENT TRAILER WIRING: 7-way molded plug and pre-wired junction box makes it much easier for wire connections as well as keeping all your wires organized and protected, eliminates troublesome splicing, and simplify installation
  • DURABLE CONSTRUCTION: 100% copper wire ensures great conductivity, soft and rugged PVC material jacket providing flexibility in use. Weatherproof, moisture, abrasion, and corrosion-resistant
  • GOOD SEALING PERFORMANCE: ABS housing junction box coupled with rubber grommets providing superb protection against rough weather condition
  • WIRING INSTRUCTIONS: The color of the wiring may not match the color of your trailer, please compare the wiring diagram in the picture or manual
Bestseller No. 7
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. 8
Leisure Cords Heavy Duty 7 Way Plug Inline Trailer Cord with 7 Gang Junction Box - 4 Feet, Weatherproof (4-Foot)
  • Leisure Cords 4 Foot 7-Way cords with Junction box. The Leisure Cords 7-Way Trailer Cord with Junction Box provides a fast, simple way to connect the wires from the trailer cord to the trailer wiring while keeping all your trailer wiring in order.
  • 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.
  • Easily Identify the Correct Connection- 7 Pole junction box is wired with color marked 7-poles that can be easily identified, Blue: 12AWG Electric Brakes ;Brown:14AWG Rigth yurn/stop ;Green:14AWG Running/Tail Lights ; Red: 14AWG Left Turn/Stop ; Yellow:14AWG Reverse Lights; Black: 10AWG 12(+)/Auxiliary; White: 10AWG Ground(-)
  • High Quanlit- Adopted high end pure copper,weather Resistant, Wires are Coated with a Thick Rubber-like Insulation, 8 feet long length cord with soft PVC housing
  • FLEXIBLE CONNECTION - Available in 4 ft, 8FT and 12Ft 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
Bestseller No. 9
Kohree 4 Way Flat to 7 Way Round Blade Trailer Adapter Plug End 4 pin to 7 pin Electrical Connector with Mounting Bracket for RV, Truck, Car
  • 【Tight-Fitted Towing Adapter】 This adapter converts the 4-way flat socket to the 7-way round type socket, connecting tail light, reverse light, turn signals, brakes, and auxiliary power, transfer the power from the vehicle to trailer.
  • 【Hassle-Free Setup】Standard round 7-way flat blade connector easily and tightly snaps into trailer's existing socket and holds without any wiggle or loose, simple plug-and-play. Protective weatherproof cap, it's READY for any road condition.
  • 【Ultra Durability】Kohree trailer connector is made from heavy plastic for lightweight and durability. Brass terminals and tin contact offer better electrical conductivity. A well-sealed spring-loaded dust cover protects the connector from dust.
  • 【WIdely Application】Kohree Heavy Duty 4 way to 7 way adapter, offers a trusted power supply for towing, well lights up running lights, tail lamps, RV camper lights or other 4-pin led accessories.
  • 【Universe Plug】This 4 way trailer adapter plug works fine with any factory OEM 7-way plug, suitable for Boat, RV, ATV, Chevrolet, Ford, Dodge, RAM, Toyota, or GMC.
SaleBestseller No. 10
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

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Last update on 2021-09-08 / Affiliate links / Images from Amazon Product Advertising API

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