4 Way Flat Trailer Y-Splitter Adapter Extension Harness

: In stock

Regular price $9.96


About this item

  • Premium Insulating Silicone Housing, Worry-free About Wiring Safety, Super Flexible and Durable
  • Built To Last: Employ quality pure copper wire with tin plating for the best current conductivity and anti-oxidation ability, and premium PVC coating for the best anti-corrosion and anti-aging ability. Withstand sea water, no brittleness, no break, durable to last.
  • Color Coded Wires: Wires are color-coded and bonded, white for ground, brown for running and license light, yellow for left stop turn, and green for the right stop. Easily route into your trailer's wiring system and connect with lights.
  • Standard 4 Way Flat Connector: Male plug with 4 wires, female plug with 4 wires. Plug and play match with any other standard 4-pin flat plugs.
  • Universal Application: perfect for connecting your trailer led bars, tailgate light bars, rear camera, etc.


vehicle wiring harness

Key Features


Standard 4 Way Flat Connector

A flexible 4-way Y-Splitter adapter can be plug and play, flexible and easy installation. Fits all types of trailers, and helps to extend your one without splicing new wires.

Quality Wire

Quality Wire

Use pure copper wire with tin plating and premium PVC coating. Gets it the best current conductivity, anti-oxidation ability, and anti-corrosion, anti-aging ability.

Durable in Sea Water

Durable in Sea Water

Withstand sea water, no brittleness, no break, durable to last, meet the purpose of most trailer lights.

Wide Application

trailer led bars, tailgate light bars, rear camera, etc.

wire harness

All Orders gets free standard delivery.

  • Standard delivered 7-10 Business Days
  • Express delivered 3-7 Business Days
  • For the 2023 holiday season, eligible items purchased between November 1 and December 31, 2023 can be returned until January 31, 2024

  • Orders are processed and delivered Monday-Friday (excluding public holidays)

    all customers enjoy free returns.

    Proposition 65 Warning for California Consumers

    WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to www.P65Warnings.ca.gov/passenger-vehicle

    WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    4 Way Flat Trailer Y-Splitter Adapter Extension Harness

    Regular price $9.96

    Customer Reviews

    Based on 30 reviews
    Cathryn Kiwanuka
    Very straight forward

    Was just what I needed to rewire my old utility trailer! Worked great!

    Amir Dhingra
    Ground wire that goes all the way to the back of the trailer assures good connection!!

    I buy this one because of the full length ground wire. Clear instructions so I know which wires go to which side. I have put this on a couple of trailers and highly recommend it.

    Jaco Grobler
    works like it should

    works good

    Douglas Kiganda
    Quality product

    I purchased this wiring harness to replace the original harness that came with my utility trailer. This harness is by far better quality. Easy to install and all of the lights worked first time. Would definitely recommend.

    Kalpana Doshi
    Don't know why but the lock and some of my windows started not working on the drivers side

    Not sure why but I started having trouble with the drivers side locks and windows Not working. Even after removing it. Could be the car I really don't know.

    Jasen Rogahn
    Wire harness

    Great product

    Sohail Koshy
    It did the job

    Perfect for what I needed no issues installing it

    Edward Witting
    Full length ground wire

    I picked this to rewire an old trailer. Trailer lights often fail because they are grounded to the trailer frame and the ground connections corrode. With this set it grounds from the vehicle all the way to one of the trailer lights. You then have to send a ground wire from one light to the other. I also grounded the trailer.The set comes with a vehicle harness as well, but unless you have an old vehicle with a 2 wire system you will need a 3 to 2 (not 2 to 3) converter to use the included vehicle harness and get both brake and turn signals. Easier to just buy a 3 to 2 converter with harness like the Curt 56175.

    Evelyn White
    does it fit


    Kane Schmeler
    Good product

    Superr cooll