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The Best trailer light wiring harness of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best trailer light wiring harness of 2022. Check our ranking below.

2,926 Reviews Scanned

Rank No. #1
LIMICAR Trailer Wiring Harness Kit, 25ft Trailer Wire with 4 Flat Extension Connector, 4 Pin Flat Wishbond Wiring Light Kit for Utility Boat
  • 21FT Male & 4-Flat Female Trailer Wiring Harness Extension Kit: Fits Trailers under & over 80" wide. Wire length (21' & 4') makes this trailer harness kit perfect for trailers measuring under or over 80" wide.
  • 18 AWG Color Coded Wires Wishbone Style Harness: 4 flat trailer wire is color-coded and bonded wire for easily installation. White wire: Ground (Negative). Brown wire: Tail Lights. Yellow wire: Driver Side Stop/Turn Lights. Green wire: Passenger Side Stop/Turn Lights. The white ground wire is made of 18-gauge, reduce corrosion and makes installation safe.
  • 25' Trailer Wiring Harness: Designed to split at the trailer tongue and run down each side of the trailer, 4' trailer side ground wire is enough to use for your trailer. Gives you the extra length, just need to extend current truck to trailer wires. No need to splice your new wires, simply extend them with this extender.
  • 4-Way Flat Trailer Harness Kit: Complying with SAE J1128 standards for a low voltage primary cable. Constructed from the highest quality materials and superior quality guaranteed.
  • Widely Application: Trailer Light Wire Suitable for marine boat trailer, horse trailer, ATV trailer, and other cargo utility trailer hitches (tow/haul vehicle must have 4-way plug). Not compatible with motorcycle trailer wiring. Please confirm the fitment with us before ordering.
Rank No. #2
ATQYZLM 22FT 4 Pin 5 Wire Trailer Wiring Harness Protected by Nylon Net Tube, Utility Pure Copper Boat Trailer Wiring Kit for Trailer Tail Light Rewiring, Waterproof 4 Pin 5 Wire Trailer Connector
  • RELIABLE AND SAFE: The 4-Pin Flat 5-Wire Harness Kit is made of thick PVC-coated wire material that resists corrosion, and the plug cover keeps dirt and water out when not in use. The 18AWG pure copper wire has excellent conductivity and is protected by black nylon mesh tubing. You can rest easy in all weather, in all environments.
  • EASY INSTALLATION: The 4-pin 5-wire trailer wiring harness adapter features a forked design that eliminates the need for splicing and greatly simplifies the wiring process, and the colour-coded labels on the harness and the included guide will help you to wire your trailer with ease, just like a professional electrician.
  • THE RIGHT SIZE: 22 feet of 4-pin, 5-conductor flat cable and 2.5 feet of ground wire provide enough length to easily rewire tail lights on RVs, trucks, boats, snowmobiles and other utility trailers. It is ideal for trailers under or over 80 inches wide.
  • VERSATILE APPLICATIONS: Designed to mate with industry standard 4-way flat sockets, the 4-Pin 5-Wire Trailer Connector Replacement provides your trailer with a male connector that can be used to replace frayed or broken wires on a variety of trailers.
  • WHAT YOU GET:A reliable wiring solution for trailer lights-4 Pin Flat 5 Wiring Harness Kit , If you have any questions about the product, please contact us in time, as a responsible seller, we will provide you with a satisfactory solution within 24 hours.
Rank No. #3
Oyviny 4 Pin 5 Wire Trailer Wiring Harness 22FT for Rewiring Both-Side Taillights, Pure Copper Wishbond Trailer Light Kit 4 Way Flat 5 Wire Plug w/Nylon Net Tube Protection
  • Y-Harness Connector: 4 pin trailer wiring harness adapter features wishbone design, widely fits for rewiring trailer that allows 2 brown wires running left and right taillights simultaneously; No need for splicing other wires
  • Color coded wires: 4 way 5 wire trailer side flat connector equips with color code wiring for a simple installation, you can easily splice into existing trailer wiring to connect the brake lights, turn signals and left and right side taillights
  • Durable Construction: 4 pin flat 5 wire harness kit use thickened PVC wire coating materials for anti-corrosion, pure copper wires for good conductivity, and is well protected by a black nylon net tube, ensure long service life
  • Enough length: 22 feet male 4 flat wire and 2.5 feet Ground wiring is long enough to wire a trailer from the start, provides plenty of extra length for a flexible installation
  • Wide Application: 4 pin 5 wire trailer connector replacement is designed to match industry-standard 4-way flat sockets, provides a male plug for your trailer and can be used to replace a worn out, broken wire on a wide variety of trailers
Rank No. #4
22 Ft 4-Pin 5-Wire Trailer Wiring Harness with Nylon Mesh Protection, A Trailer Light Kit Suitable for Re-Wiring The Tail Lights, Brake Lights, and Turn Signals on Trailers, Rvs, and Boats
  • Worried About Quality: Our trailer wiring harness is made of 18 AWG pure copper wire with thick PVC wire insulation, and it is equipped with a nylon mesh guard for added protection. This ensures reliable performance even in various harsh weather conditions and environments
  • Custom Designed Y-Harness: This trailer light wiring harness has a unique wishbone design, and 4-pin arrangement, that allows rewiring of trailers. It eliminates the need for splicing other wires by facilitating simultaneous running of left and right taillights
  • Worried about installation: This 4-pin, 5-wire trailer wiring kit comes with color-coded wires, making it easy to install even for those with little to no electrical knowledge
  • Ample Length: This 4-pin 5-wire trailer light wiring kit provides a generous 22 feet of wire, ensuring you won’t have to worry about it being too short. It offers plenty of length for flexible installation and rewiring of your trailer
  • Versatile Use: The 4-pin 5-wire trailer harness with a side flat connector is designed for various trailers. It features a male plug with a waterproof cover, making it ideal for boat trailers, ATV trailers, flatbed trailers, or other multipurpose cargo trailer hookups
Rank No. #5
MAXXHAUL 70205 Trailer Light Kit - 12V All LED, Left and Right Waterproof Submersible for Trailers, Boat Trailer Truck Marine Camper RV Snowmobile, Red
  • Complete Light Kit: This comprehensive kit includes two 12V LED stop, tail, and turn signal lights, two amber clearance lights, a license plate bracket, and a wiring harness. Its universal fit ensures compatibility with various trailers.
  • Easy Installation: The 22 ft. split Y-style color-coded wiring harness streamlines installation, offering both ease and convenience. You'll spend less time on setup and more time on the road.
  • Long-Lasting LED Lights: Enjoy the benefits of premium LED tail lights that offer superior visibility and longevity compared to standard incandescent lights. Their extended lifespan ensures reliable performance over time.
  • DOT Compliant: Engineered and designed to adhere to DOT FMVSS 108 regulations and standards, these lights meet legal requirements for safety and road compliance.
  • UV-Coated Wiring Harness: The included wiring harness features UV-coated jackets, enhancing its durability and protection against the elements. This feature contributes to the overall longevity of the kit.
SaleRank No. #6
CheeMuii 7 Way Trailer Wiring Harness Kit 8 FT Trailer Cord with 7 Pin Trailer Plug and Junction Box Kit Premium Light and Brake Wiring Wires for Trailer RV
  • DOUBLE PRONG TRAILER PLUG: Cheemuii 7 pin trailer plug uses the premium copper double prong to replace the poor single prong, and the outer wrap is made of weatherproof and durable material to ensure a longer service life
  • JUNCTION BOX: The junction box is equipped with 7 color-coded terminals and wires, which can easily identify the corresponding functions of the wires and facilitate wiring. Strong junction boxes are waterproof and dust resistant to increase the service life of trailer cords
  • COPPER POWER CORD: The 7 way trailer wire is made of high-quality copper and has a long service life. And has excellent electrical and thermal conductivity, to ensure the normal use of car lights in the process of driving (such as turn signal and brake lights, etc.)
  • DETAILED WIRING INSTRUCTION: CheeMuii trailer cords use 7 color-coded wires, and the color code adopted is suitable for most RV trailer wiring standards, but as there are some differences between trailer manufacturers, we have updated the detailed instructions, please read them carefully before use. Please refer to the wiring instructions and connect cables according to the color and function of the wires to avoid errors
  • WIDE APPLICATION: Suitable for trailers, RVs, campers, caravans, food vans and other towed vehicles. Perfectly connected taillights, brake lights, reverse lights, turn signals and auxiliary power
SaleRank No. #7
LIMICAR 100FT 14 Gauge Trailer Wiring Harness Kit - 4-Way Bonded, Color-Coded Boat Trailer Wiring for Lights
  • 100FT Copper Clad Aluminum Trailer Wiring Harness Kit: 14-Gauge bonded trailer wiring includes 100 foot of color-coded wire for rewiring a trailer or splicing in a connector. LIMICAR Trailer Wiring Harness suitable for trailers, trucks, and more.
  • Color Coded Wires Wishbone Style Trailer Wiring: 4 flat trailer wire is color-coded and bonded wire for easily installation. White wire: Ground (Negative). Brown wire: Tail Lights. Yellow wire: Driver Side Stop/Turn Lights. Green wire: Passenger Side Stop/Turn Lights.
  • 100 Foot Per Spool/Roll Boat Trailer Wiring Kit: Complying with SAE J1128 standards and come with high-quality PVC insulating tape. Constructed from the highest quality materials and superior quality guaranteed.
  • 14-Gauge, 60 Volts Trailer Wiring Harness: The 4-wire construction can be used for either 4-way flat or 4-way round plugs and sockets. The white ground wire adopts a 14 wire gauge to reduce corrosion and ensure safe installation.
  • Widely Applications: The 100ft 14 gauge trailer wire can used in a trailer, truck, off-road, horse trailer, ATV trailer and car coasting. Any problems, please feel free to contact with us.
SaleRank No. #8
Seamaka 25ft 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, Trailer Wiring Harness with 18 Gauge White Ground Wire for Trailers O-016
  • Product Size: This is a 25-foot 4-way boat trailer extension wire
  • Material: Made of heavy duty materials, it can resist corrosion for a long time
  • Design: This trailer connecting wire is equipped with a 4-way flat plug connector, which is used to supply power for tail lights, turn signals and brake lights, and grounding connection; It is convenient to use and saves time
  • Application: It is widely used in marine trailers, horse trailers, motorcycle trailers, ATV trailers and other multi-purpose cargo trailer hitch devices (note: there must be 4-way plug)
  • Package: 1 trailer light wiring harness extension
Rank No. #9
MICTUNING Heavy Duty 7 Way Plug Inline Trailer Cord with 7 Gang Junction Box 8 Feet, Weatherproof
  • TIDY YOUR WIRE HARNESS - 7-way 100% 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
  • GOOD 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
  • GOOD 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: 1 x 7-Way Trailer Plug with Junction Box, 4x Open Grommets, 4x Close Grommets, 1x Waterproof cover
SaleRank No. #10
LIMICAR 25FT Trailer Wiring Harness Kit, 4 Wire Trailer Wiring with Nylon Net Tube Protection, 4 Pin 5 Way Plug Trailer Wire Kit for Enhanced Durability - Wishbond Trailer Light Wire
  • Y-Harness 4 Pin 25FT Trailer Connector. Trailer wiring harness kit 4 pin features wishbone design. Designed for rewiring trailer, allows 2 brown wires running left and right taillights at the same time. No need to splice your new wires, simply extend them with this extender.
  • 25FT 4 Pin Trailer Wire: 4 pin trailer wiring harness designed to split at the trailer tongue and run down each side of the trailer. 5 wire trailer wiring is perfect to match industry standard 4-way flat socket.
  • 18 AWG Color Coded Trailer Wiring Harness: 4 flat trailer wire is color-coded and bonded wire for easily installation. Just need splice into existing trailer wiring to connect the brake lights, turn signals and left/right side taillights.
  • Superior Quality of Trailer Wire Kit: Trailer wiring harness kit is made of thickened PVC wire coating and high-quality copper clad aluminum wire, reinforced with black nylon net tube on the outermost layer, ensure for a long service life.
  • 25FT Trailer Wiring Harness: 25 feet male 4 flat wire and 2.5 feet Ground wiring provides enough length for flexible installation and trailer rewiring. 5 wire trailer wire suitable for marine boat trailer, horse trailer, ATV trailer, and other cargo utility trailer hitches (tow/haul vehicle must have 4-way plug). Not compatible with motorcycle trailer wiring.

Last update on 2025-05-09 / Affiliate links / Images from Amazon Product Advertising API

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  1. Brand Value: Every brand of trailer light wiring harness has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an trailer light wiring harness?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your trailer light wiring harness.
  5. Customer Ratings: Number ratings grade trailer light wiring harness objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their trailer light wiring harness.
  7. Product Quality: You don’t always get what you pay for with an trailer light wiring harness, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an trailer light wiring harness is should be an indication of how long it will work out for you.

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