The Best 4 prong trailer wiring of 2022 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best 4 prong trailer wiring of 2022. Check our ranking below.
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- 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.
- 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
- 【Trailer-Side 4 Pin Replacement Wire】 4 pin trailer wiring harness male plug mates with an industry-standard trailer plug 4 way flat female receptacle to fit a variety of trailer 4-pin trailer wire connector.4 way trailer wire harness replaces a variety of trailer wear and tear wires.
- 【Heavy Duty Trailer Light Plug】Adullama 4 pin trailer connector is a superior upgrade to your 4 prong taped wires on trailers; No more electrical tape with exposed yellow, green, brown, white
- 【Durable & Long-Lasting 】 Adullama 4 way flat trailer connector is made of heavy-duty 18 AWG pure copper wire, molded 4 wire trailer plug is made of upgraded high-quality PVC material that provides excellent weatherproof and abrasion proof
- 【Widely Application】The trailer wiring harness is compatible with under & over 80” wide trailers. it is also suitable for marine boat trailer, horse trailer, ATV trailer, and other cargo utility trailer hitches (tow/haul vehicle must have 4-way plug)
- 【What you will get】You will get 1* 4 Pin Trailer Wiring Harness and 4 pcs Solder Seal Wire Connector Heat Shrink Butt. If there is any quality problem with our products or you are not happy with your purchase in our store, please kindly contact us
- Wire Length Details- Our 4-way trailer wiring harness includes 4 pin 21.65ft male & 3.94ft female extension connector and Install the accessory kit. this 25 ft trailer wiring harness is made of 18-gauge wire, designed to split at the trailer tongue and run down each side of the trailer.
- Durable & Corrosion Resistant- The use of high quality pure copper wire and tin plated layer to achieve the best electrical conductivity and oxidation resistance, and the use of high quality PVC material for the best anti-corrosion and anti-aging ability. Work perfectly even with sea water.
- Connect quickly- Male plug with 5 wires, female plug with 4 wires. And you can install the trailer wire so quickly and easily through the 4-way connectors and Matching installation accessories. It matches with any other standard 4 pin flat plugs.
- Wire Connect Tips- Wires are color coded and bonded, Green- Right Turn Lights/Brakes, Yellow- Left Turn Lights/Brakes, Brown- Tail Lights/Running Lights, White-Ground Wire.
- Wide Application- The trailer wiring harness is suitable for under 80" wide trailers, such as marine boat trailer, horse trailer and other cargo utility trailer.
- 4 Way Flat Plug End: - This Trailer side 4 pin trailer wiring male plug fits wide variety of trailers with industry-standard 4-way flat sockets; Ideal for marine boat trailer, horse trailer, motorcycle trailer, ATV trailer, and other cargo utility
- Standard Color Coded: - MECMO 4 Wire trailer light wiring harness comes with color coded 4-wire, clearly identify each wire's function, can be used to power the taillights, brake lights and turn signals
- Direct Replacement 4-Pin: - This 4 prong trailer wire plug connector equipped with blunt-cut, color-coded wires, and four snap locks, comes ready to splice into your existing trailer wiring
- Heavy Duty: - MECMO electrical connectors trailer harness is made of 16 AWG heavy duty and pure copper terminals, great corrosion-resistance, conductivity and optimal light intensity
- 25" Trailer-side Replacement Plug: - About 25 Inches cable length, this flat 4 pin trailer light plug provides a more convenient male plug arrangement for replacing broken wires on a variety of trailers
- 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.
- 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
- Material: The wiring harness plug of 25-inch 4-way 18 AWG 4-foot trailer is made of 16 heavy-duty pure copper terminal, which has good conductivity and corrosion resistance, prolongs service life and resists bad weather
- Size:The design length of the trailer male connector is about 25 inches (64 cm), which provides enough length for flexible installation and rewiring of the trailer and is convenient for use and installation
- Application: 25-inch 4-way 18AWG 4-foot trailer harness is attached to various trailers, motorcycle trailers, ideal marine trailers, ATV trailers, and other cargo utility trailers
- Install:The 25-inch 4-way 18 AWG 4-legged trailer harness is equipped with 18AWG color-coded wires, which are used to connect the left and right taillights, brake lights and turn signals, rewiring your trailer for easy installation
- Tips: Our products are fine in workmanship. If you have any problems when using them, please contact us in time and we will deal with them as soon as possible
- Trailer-Side 4 Pin Extension Wire: This trailer wire extension with 4 way flat plug connector is designed to provide plenty of extra length for your flexible installation. Provides a more convenient male plug arrangement for replacing broken wires on a variety of trailers. It can be used for marine boat trailers, horse trailers, motorcycle trailers, ATV trailers, and other cargo utility trailer hitches as long as it has a 4-way connection.
- Heavy Duty Trailer Light Plug: Nilight Trailer End Connector 4 Wire is a superior upgrade to your 4 prong taped wires on trailers. Come with 18 AWG standard color-coded wires ensure your proper wiring connection to your taillights, brake lights and turn signals.
- 4-pole flat connector: This 4-prong trailer light plug wiring equipped with blunt-cut, color-coded trailer wires, comes ready to splice into your existing trailer wiring. 4-pin connectors are available allowing the basic hookup of the lighting functions (Left/Right turn and brake lights) plus one pin is provided for a ground wire. (Not compatible with motorcycle trailer wiring, please confirm the fitment to be not the wrong item before ordering.)
- Built to Last: Nilight Flat 4-pin male end trailer harness is made of heavy duty 18-gauge wires and pure copper terminals, excellent weatherproof & abrasion proof cable sheath, Color coded wires for clearly identified as each wire's function, Extends wiring system provides more flexibility. Rated voltage: 300V. Heat resistance: 105°C. It is wrapped with insulating rubber that will never rust or corrode.
- Package: 1x 5Ft 4 Way Trailer End Connector Wire, 1 x User Manual, 2 Year Warranty by Nilight.
- EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of these vehicle-trailer connectors. They feature tabs on the top and bottom for a better grip when plugging in or unplugging
- RELIABLE CONNECTION. These 4-pin trailer wiring plugs come ready to splice into your existing vehicle and trailer wiring. They have 16-gauge wires and can be used to connect the taillights, brake lights and turn signals
- VERSATILE DESIGN. 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
- DURABLE CONSTRUCTION. 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
- READY TO INSTALL. Equipped with color-coded wires, these 4-prong trailer wiring connectors come ready to install. The 72-inch wire loop provides plenty of extra length for a flexible installation
Last update on 2025-08-19 / Affiliate links / Images from Amazon Product Advertising API
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FAQ:
Q: How to wire a 4 pin trailer connector?
A: Power&Ground. The white wire must be attached to the trailer for the grounding and power supply of the lights. … Rear Lights. The brown wire is attached on one side to the rear lights and market lights. Strip both ends and fix them with a butt connector at both ends. Marker Lights. You need butt connectors to connect one end of the marker lights to the other ends. …
Q: How do you wire a trailer?
A: Connect the white wire to the trailer frame using a self-tapping screw. Splice all wires to the same color wire on the 5-pin connector. Tape all connections. Wire color codes may not be the same on the truck as on the trailer. If you’re adding a 5-pin truck side connector, use a test light to determine the circuit colors.
Q: What is the difference in a 4 and a 3 prong dryer cord?
A: The key difference between a 3-prong and 4-prong dryer hookup is the wiring. The 3-prong dryer hookup has only two hot wires and a neutral wire.
Q: How to hook up trailer light plug?
A: Prepare for Trailer Wiring Installation. Start by making sure you have everything you need to wire your trailer lights. … Connect Ground to Trailer Frame. Attach the white ground wire directly to a clean,bare section of the trailer frame using a self-tapping screw and ring terminal. Run Wires Along Trailer Frame. Run the rest of the wires along the trailer frame to the taillights. … Make Trailer Connections. Once the wires have been run to their respective appropriate locations,it’s time to make the connections to your trailer’s lights.