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Aila 25Ft 4 Pin Trailer Wiring Harness Kit (21FT 5-Wire Male & 4FT 4-Wire Female), Quick-Connect 4Way Flat Extension Connector Plug, Color-Coded Wire Setup

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$8.54

$ 4 .99 $4.99

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About this item

  • Extended Wire Length for Versatility - Our 4-way trailer harness extension kit features an ample 21-foot male and 4-foot female wiring setup, making it ideally suited for both under and over 80" wide trailers. This length provides flexibility for a variety of trailer sizes and configurations.
  • Superior Durability & Corrosion Resistance - Constructed with high-quality pure copper wire and a tin-plated layer, our harness achieves outstanding electrical conductivity and resistance to oxidation. The high-grade PVC material offers exceptional anti-corrosion and anti-aging properties, ensuring longevity and reliability, even in marine environments.
  • Effortless Connection System - Equipped with a male plug featuring 5 wires and a female plug with 4 wires, our trailer wiring harness allows for quick and easy installation. The 4-way connectors and included matching installation accessories ensure compatibility with any standard 4-pin flat plugs, simplifying the setup process.
  • Intuitive Wire Configuration - To facilitate a hassle-free installation, our wires are color-coded and bonded, with green for right turn lights/brakes, yellow for left turn lights/brakes, brown for tail lights/running lights, and white as the ground wire. This clear identification aids in a straightforward and error-free setup.
  • Broad Compatibility for Multiple Applications - Designed to cater to trailers under 80 inches wide, this versatile wiring harness is perfect for a wide range of applications, including marine boat trailers, horse trailers, and other cargo utility trailers. Its universal design ensures it meets the needs of various towing vehicles and trailer types.



Product Description

trailer wiring harness
trailer wiring kit

trailer wiring

4 pin trailer connector

trailer wire harness 4 wire

4 wire trailer wire harness
trailer wiring harness

MARK
Reviewed in the United States on March 6, 2025
Plenty of wire for just about every trailer !
Steve
Reviewed in the United States on March 20, 2025
Just what I needed and cheap.
TK
Reviewed in the United States on August 1, 2024
Much more link than I needed for my trailer, but a very nice kit. Promptly delivered and will make my trailer much better.
hoanguyen
Reviewed in the United States on May 27, 2024
Nice product.
Rick
Reviewed in the United States on April 29, 2024
Did not look close enough at the ad, too short once you take away 6ft. furnished for truck side. Bought a 42ft. for a 21ft trailer.
Evan b.
Reviewed in the United States on April 23, 2024
Works perfect on my trailer
R. Prosser
Reviewed in the United States on April 21, 2024
Small Gauge Wire Suitable for Only Low Current LED Lights – Useless Wire Clamp ClipsI was disappointed to get this wiring harness so called “kit” when I discovered that the wire gauge is too small a size for my needs. The website did state that the wire is tiny at 18AWG size. I just was not being a careful enough shopper. The kit includes some useless frame mount wire attachment clips. The clips have a large opening to make it easy for you to slip in the wire, however, the large opening also allows the wire to easily slip out all by itself. All the other frame mount wire attachment clips I have ever used had a closed spring loaded area that you had to 1) pry open, 2) slip in your wire, then 3) remove the pry tool and the spring clip would close the opening so that the wire would be trapped and stay put.
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