Are you looking for the Trailer Wiring Harness? Based on expert reviews, we ranked them. We’ve listed our top-ranked picks, including the top-selling Trailer Wiring Harness.Having trouble finding a great Trailer Wiring Harness?

This problem is well understood by us because we have gone through the entire Trailer Wiring Harness research process ourselves, which is why we have put together a comprehensive list of the Trailer Wiring Harness available in the market now.

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The Best Trailer Wiring Harness Comparisons Chart

Review of The 10 Best Trailer Wiring Harness

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
  • 【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 COPPER 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.
SaleBestseller No. 2
LIMICAR Trailer Wiring Harness Kit, 25ft Trailer Wire, Trailer Wiring Harness with 4 Flat Extension Connector, 4 Pin Flat Wishbond Trailer Wiring for Utility Boat Trailer Light Kit
  • 25FT Male & 4-Flat Female Trailer Wiring Harness Extension Kit: Fits Trailers under & over 80" wide. Wire length (25' & 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.
Bestseller No. 3
4 Pin Flat Trailer Wiring Harness Kit [Wishbone-Style] [SAE J1128 Rated] [25' Male & 4' Female] [18 AWG Color Coded Wires] 4 Way Flat 5 Wire Harness For Utility Boat Trailer Lights Kits
  • 25' MALE & 4' FEMALE INCLUDED- Our 4-way trailer wiring harness includes both the male and female sides for added value.
  • WISHBONE STYLE WIRING SETUP- Wishbone design makes it easier to wire to the taillights; simplifies installation process.
  • SAE J1128 RATED- Meets SAE standards for a low voltage primary cable intended for use at a nominal system voltage of 60 V DC (25 V AC) or less in surface vehicle electrical systems; backed by a 2 year warranty.
  • FOR TRAILERS UNDER & OVER 80" WIDE- Long total wire length (25' plus 4') make this trailer harness kit perfect for trailers measuring under or over 80" wide.
  • 18 AWG COLOR CODED WIRES- Color coded 18 AWG wires clearly identify each wire's function; makes installation safe and straight-forward.
Bestseller No. 4
LINKITOM 4-Way Trailer Wiring Harness Kits, 25-Foot 18 AWG Color Corrosion Resistant Coded Wires with 4 Pin Flat Plug, for Utility Boat Trailer Lights
  • 25ft Wire Harness: 21.65ft length male wire harness and 3.93ft female wire harness
  • 4-way 4-pin hitch trailer wiring harness with connectors
  • Installation easy through the 4-way connectors.
  • Complying with SAE J1128 Standards
  • 18 AWG color coded wiring harness, more durable than the traditional copper coated aluminum wires and split Y-style color coded harness.
Bestseller No. 5
Billion wealth 18AWG 20 Feet 4 Wire 4-Flat Trailer Wiring Harness Extension Kit
  • This 4 pin trailer connector is designed to match industry standard 4way 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
  • Material:Made of Pure copper, Wire diameter 18AWG , The safe temperature is below 105 degrees Celsius and the safe voltage is below 300V. It is wrapped with insulating rubber that will never rust or corrode.
  • If you need trailer lines of other sizes and specifications, you can also click on the other links
  • Safe: The hard PVC shell can protect the wire, anti-corrosion, anti-oxidation, and the rubber-coated design at the wire joint can be more effectively waterproof
  • Universal - Compatible With TRAILERS UNDER & OVER 80" WIDE. Suitable for all types of trailers including marine boat trailer, horse trailer, motorcycle trailer, ATV trailer, and other cargo utility trailer hitches
SaleBestseller No. 6
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. 7
CURT 56040 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Subaru Ascent, Forester, Outback, Crosstrek, XV , Black
  • EASY TO INSTALL. No cutting! No splicing! This trailer wiring harness kit plugs into existing factory wiring on your vehicle and equips it with a standard, rear 4-pin trailer wiring connector for plugging in and towing a trailer
  • STANDARD CONNECTOR. This plug-in 4-flat trailer wiring can be used to connect trailer tail lights, brake signal lights and turn signals. 4-way trailer light wiring is popular on a wide variety of trailers, adding versatile towing options for your vehicle
  • VEHICLE-SPECIFIC. This aftermarket, vehicle-trailer wiring harness is designed for select years of the Subaru Ascent, Forester, Outback, Crosstrek and XV Crosstrek (factory tow package required)
  • RELIABLE POWER. This 4-way trailer wiring harness is built with surface mount technology. This type of circuitry generates less heat, optimal light intensity and durable performance
  • DUST COVER. To promote long-lasting use and weather resistance, this 4-pole trailer lighting wire harness comes with a rubber dust cover. It easily fits onto the 4-way flat connector when not in use, protecting it against the outdoor elements
Bestseller No. 8
Goupchn 4-Way Trailer Wiring Harness 18AWG 6.56ft 4-Pin Trailer Connector to 4 Flat Trailer Wire Extension Cable
  • 4 way trailer wiring harness is made of high quality 18AWG copper wire which is soft and durable. The shell is wrapped by insulating rubber, anti-rust and anti-corrosion. Rated voltage: 300V. Heat resistance: 105°C.
  • The 4-pin trailer connector is designed to mate with an industry standard 4-way flat receptacle, providing your trailer with a male plug that can be used to replace frayed broken wires on a variety of trailers.
  • This 4-pin trailer wiring plug is ready to splice into your existing trailer wiring. It can be used to connect tail lights, brake lights and turn signals. Suitable for all types of trailers including boat trailers, horse trailers, motorcycle trailers, ATV trailers and other cargo utility trailer hitches.
  • Package include: 1 Pack 18AWG 6.56ft 4-Way trailer wiring harness.
  • Warranty: Hope you can be satisfied with our products. We provide guarantee of a 30-day replacement or refund for any problem and 1 year warranty. If you have any question, feel free to contact us.
SaleBestseller No. 9
SUZCO 36 Ft 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, Custom-Made 28' Male & 8' Female with 4' White Ground Wire, 4-Way Plug 4 Pin Male & Female Extension & Wishbone-Style & SAE J1128
  • 【ITEM TYPE】This is our SUZCO custom-made vehicle-specific 36FT male & female 4-flat marine trailer wiring harness with 4-way conductors and a 4' white ground wire, it fits for longer trailers and for customers desiring to wire, made of 18-gauge wire, designed to split at the trailer tongue and run down each side of the trailer. This trailer wire harness kit is completely sealed for a long corrosion-resistant installation.
  • 【36' EXTENSION INCLUDING】This 36foot 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 a 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】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. 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. 10
ONLINE LED STORE 8ft 7-Way Trailer Plug Cord Wiring Harness [7-Pin Trailer Wire Cable] [Brake & Light Control] [10-14AWG] 7 Prong Trailer Light Cord Wiring Connector for RV
  • PAINLESS REPLACEMENT - Easily upgrade the corroded old 7-way plug on your trailer, RV, food truck, or tow truck.
  • EXCEPTIONAL VERSATILITY - Perfect for trailers with brakes, reverse lights, and any other auxiliary power needs such as charging trailer battery, powering interior lights, keeping the refrigerator cool, etc.
  • EASY TO USE - Cable has been stripped and color coded to simplify the installation. The locking plug end features finger lugs for easy removal.
  • SAFE AND SECURE CONNECTION - No more dangerous flickering lights or malfunctioning equipment. 10-14 AWG, high quality, double prong, copper terminals ensure a solid connection every time.
  • LIFE PROOF - Commercial grade, kink free PVC sheathing is waterproof and corrosion resistant for years of reliable service.

Things to Consider When Choosing The Best Trailer Wiring Harness

The Right Brand

When deciding to purchase your most-required product, you always should think about the brand and its market reputation carefully. When you find reliable and reputed brands for your desired item your buying procedure will just become easier.

We recommend you to compare several brands and the user experiences of these brands to get a clear perception of the brands. This should help you understand how users perceive the brands as well as how much the brands value their clients.

Pricing

Regardless of the goods you want to buy, the price is an important factor to consider. It will have a significant impact on your purchasing decision and will have a significant impact on the item’s features and performance. You should evaluate the price of the product to that of other manufacturers as well as the expected features. The idea is to get the best value for your investment. Also keep in mind that more pricey does not always imply higher performance. Thus, you should fix your budget and stick to it to get the best match.

Warranty & After-sales Service

Finally, think about the brand’s after-sales service and repair options. Is the manufacturer known for providing good customer service? Has the brand been consistently rated well by customers? Thinking about these factors will give you a better idea of what the customer’s experience is like and how the brand treats its customers. You should also consider the product’s warranty. Most manufacturers offer a 6-month to 24-month warranty for any defects in design and construction.

Final Verdict

So, you have decided to go shopping for the Best Trailer Wiring Harness? Well, you are in the right place. Our team of experts analyzed 50251 reviews of Packaged Gumbo Mix and came up with a detailed list. There are so many options, some of which seem to be perfect for you while others disappoint. We have compiled some tips and tricks to help make the process easier and more successful. There are also other factors such as cost, reliability, and warranty that need to be taken into account. We will discuss those things. This buying guide will help you find the perfect Trailer Wiring Harness for your needs. Cheers!

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