Top 10 Trailer Wiring Harness Kit – Towing Hitch Wiring

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1. ONLINE LED STORE

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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

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ONLINE LED STORE #ad - 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.

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. 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.
BrandONLINE LED STORE #ad
ManufacturerONLINE LED STORE #ad
Height2.5 Inches
Length7.5 Inches
Weight0.95 Pounds
Width3.5 Inches
Part NumberACCEPSCBL0105
Model4336325634

2. SUZCO

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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

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SUZCO #ad - The white ground wire is made of 18-gauge, which is corrosion resistant terminal. Extension includingthis 25foot 4 wire boat trailer wiring extension can conform to the sae j1128 specification. The white grounding wire is so enough long to wiring. This trailer wire harness kit is completely sealed for a long corrosion-resistant installation.

4-way connectors & fitmentyou can install the trailer wire so quickly and easily through the 4-way connectors. Trailer wiring harness features a ground wire. This trailer wire harness kit also can work on an aluminum trailer based on the ground wire. The trailer side ground wire is about 2ft. Most standard light duty trailers will use a 4-pole flat connector. Free-replacement service. It can protect tow vehicle electronics from wiring shorts.

4 wiring instructionthere are instructions for wiring the running light and license plate lights included. Enough lenght ground wirethis 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. Includes a 4-feet trunk connector, splices, and clips. The different color wires are clearly identified as each wire's function, so you can make the installation safe and straight-forward.
BrandSUZCO #ad
ManufacturerSUZCO #ad
Part NumberSUZCO888888888
Model4350429910

3. CZC AUTO

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Y Style 18AWG Pure Copper Core Color Coded Wire with Standard 4-pin Flat Plug Connector, CZC AUTO Trailer Wiring Harness Kit 4-Way Wishbone Style, 4' Female and 25' Male for 12V Trailer Boat Marine

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CZC AUTO #ad - 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. Y style: wishbone style designed boat trailer wire harness, 4pcs wires for 4-pin female plug and 5PCS wires for 4-flat male connector. The male and female plug pin size is standard which can match different standard male or female plug together.

We are always here to support you. Please find the picture and instruction for details. 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. Total 29ft: 4ft long wire on female plug side for vehicle and 25ft on male side for trailer lights, such as over & under 80" wide boat trailer, dump trailer, utility trailer, ATV trailer, long enough for all kinds of 12V 4-pin connection trailers, enclosed cargo trailer, equipment trailer, car hauler trailer and so on.

Please feel free to contact us at first if there is any problem when you receive or use our products. Wire connection: color coded wire directly match the trailer wire system for easy and safe connection. Client support: 30-day money-back guarantee, return your undamaged czc auto product and receive a full refund for any reason. 2 years warranty supplied by CZC AUTO. 2-years warranty for quality-related issues, we take care of all quality-related issues with a REPLACEMENT OR FULL REFUND.
BrandCZC AUTO #ad
ManufacturerCZC AUTO #ad
Part Number102016

4. MICTUNING

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Weatherproof, MICTUNING Heavy Duty 7 Way Plug Inline Trailer Cord with 7 Gang Junction Box, 8 Feet

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MICTUNING #ad - Excellent construction - adopted flameproof ABS junction box and good conductivity copper with solid cord, stronger and rugged, trailers, campers, caravans, perfect for RVs, 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. What you'll get:2 year mictuning warranty and lifetime best customer service, 1 x 7-Way Trailer Plug with Junction Box, making the whole junction box waterproof, 4x Open Grommets, 4x Close Grommets. 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, tail light, brake signal lamp, gives you more convenience for wiring left/right turn light, reverse light, etc. Best sealing performance - 4 open & 4 close rubber fitted grommets for option based on your wiring needs, dustproof and corrosion resistant.
BrandMICTUNING #ad
ManufacturerMICTUNING #ad
Height1 Inches
Length80 Inches
Width2 Inches
Part NumberMIC-TWB-031
ModelMIC-TWB-031
Warranty2 Yr Warranty

5. CURT

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4-Pin, 7-Pin, CURT 55774 Dual-Output Vehicle-Side Trailer Wiring Harness Connectors for USCAR

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CURT #ad - Uscar-specific. It provides two standard trailer wiring sockets, a 4-way flat and an RV blade 7-way round socket, allowing for versatile towing options. They connect the taillights, electric trailer brakes and aux power.

Weather-resistant. This trailer wiring harness socket is designed for specific vehicles with an industry-standard USCAR socket. This two-way trailer wiring socket is designed to outlast weather exposure. Reliable connection. Durable construction. The 7-pin socket has a spring-loaded dust cover that keeps the connection points dry and protected when not in use. For long-lasting use and a reliable connection, the housing of this dual 7-pin and 4-pin trailer wiring socket is made from durable black plastic that will never rust or corrode.

These trailer wiring sockets come ready to plug into existing vehicle wiring, turn signals, brake lights, reverse lights, using the factory USCAR socket. Versatile design. This dual-output connector is a great upgrade for a variety of vehicles with a USCAR socket.
BrandCURT #ad
ManufacturerCurt Manufacturing #ad
Height2 Inches
Length9 Inches
Weight1.13 Pounds
Width4 Inches
Part Number55774
Model55774
WarrantyManufaturer warranty

6. MICTUNING

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4 Pin 25 Feet Male and 6 Feet Female Connector, 18 AWG Color Coded 4-Way Flat Wires for Under or Over 80 Inches Wide Trailers, MICTUNING Trailer Wiring Harness Extension Kit

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MICTUNING #ad - The 4 flat trailer wire is color-coded to clearly identify each wire's function, no need for splicing wires. 25' male & 6' female side - our 4-way trailer wiring harness includes 25 foot male & 6 foot female, and you can install the trailer wire so quickly and easily through the 4-way connectors.

18awg color coded wires - sae j1128 rated, easily splice into your trailer's wiring system, Meets SAE standards. Wishbone style wiring setup - wishbone design makes it easier to wire to the taillights; The running lights are split into two wires on the trailer side for ease of wiring up the left and right sides without needing a jumper wire.

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. Reliable connection - 4-way flat plug connectors come ready to splice into your existing vehicle and trailer wiring, turn and brake lights, supply power for tail lights, as well as a ground connection.
BrandMICTUNING #ad
ManufacturerMICTUNING #ad
Part NumberMIC-TWH-309

7. Best Connections

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Best Connections Trailer Light Cable Wiring Harness 50 Feet 14 Gauge 7 Wire 7 Colors

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Best Connections #ad - Excellent for any 6 voLT - 80 VOLT application. 14 gauge, 50' ft, Single Conductor. Remote, turn on, Hook Up Wire. Stranded Copper Clad Aluminum. Flexible, and jacketed in pvc. Perfect for car audio, Home Theatre, Insulated, Automotive.
BrandBest Connections #ad
ManufacturerAudiopipe #ad
Height1.7 Inches
Length16 Inches
Width8 Inches
Part NumberAP-14-50 BL RD WH GRN YL BRW PU
Model8541758470

8. Best Connections

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Best Connections 7-Way Trailer Wiring Harness, 14 Ga 50 Feet

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Best Connections #ad - 7 conductor stranded 14 gauge wire harness 50 Feet. Insulated with flexible jacketing. 7 wires in one, green, blue, White, Yellow, Brown, purple, and Red. Perfect for rewiring trailers, aftermarket lights, stereo systems, and more. Cable length: 50 Feet Hand Rolled.
BrandBest Connections #ad
ManufacturerBest Connections #ad
Part NumberTR-14-7-50

9. Nilight

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8 Feet, Trailer Connector Cable Wiring Harness with Weatherproof Junction Box Suitable for RV Automotives Cars,2 Years Warranty, Nilight Heavy Duty 7 Way Inline Trailer Plug with 7 Gang Junction Box

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Nilight #ad - Flexible connection 8ft long cord with soft and durable PVC housing Flexible Connection The length prevents it from being strained during an emergency turn 7-Way Connects Brake Running Reverse Turn Signals and Auxiliary Power.

Simply 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. Package included 1x 7-way trailer plug with junction box 4 x open gaskets 4 x Close gaskets. Convenient trailer wiring sturdy junction box with color marked 7-poles convenient for wiring left/right turn light brake signal lamp reverse light tail light etc Junction box is much easier than managing loose wires.

Fit type: Universal. Good sealing performance four open and four close sealed rubber gaskets are provided to make the entire junction box waterproof dustproof and corrosion-proof.
BrandNilight #ad
ManufacturerNilight #ad
Height1 Inches
Length80 Inches
Weight2.75 Pounds
Width2 Inches
Part Number50024R
Model50024R
Warranty2 Years Warranty

10. Miady

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Miady 25ft Trailer Wiring Harness with 4 Flat Connector, 18 AWG Color Coded Wires Trailer Light Wiring Harness Extension with 4ft White Ground Wire

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Miady #ad - Simplify the installation process to save more time. 4ft lenght ground wire: equipped with 4 way flat plug connector with trailer ends and a white ground wire, designed to split at the trailer tongue and run down each side of the trailer. Please feel free to contact us. Wishbone style wiring setup designed: constructed with wishbone style Wiring Setup and 4 way connectors design makes the running light circuit and splits it at the trailer connector, so you do not have to run a jumper wire from one taillight to the other.

No need to splice your new wires, simply extend them with this extender. The trailer side ground wire is 4ft, it is enough to use for your trailer, which is completely sealed for a long corrosion-resistant installation. Simplified connection: come with 18 awg color coded wires clearly identify each wire's function, makes it much easier for wires connection as well as adding more convenience and installation safe and straight-forward.

Long enough: the miady 25' trailer wiring harness gives you the extra length, just need to extend current truck to trailer wires. We provide 24*7 friendly customer support and also back our products for 18 months. Wide application: ideal for marine boat trailer, ATV trailer, horse trailer, motorcycle trailer, and other cargo utility trailer hitches tow/haul vehicle must have 4-way plug.
BrandMiady #ad
ManufacturerMiady #ad
Part NumberTWH4M