---
product_id: 455059499
title: "25ft 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, Trailer Wiring Harness with 18 Gauge White Ground Wire for Trailers O-016"
brand: "seamaka"
price: "€ 21.86"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.fr/products/455059499-25ft-4-wire-4-flat-trailer-light-wiring-harness-extension
store_origin: FR
region: France
---

# 25ft reach 4-way flat plug Heavy-duty material 25ft 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, Trailer Wiring Harness with 18 Gauge White Ground Wire for Trailers O-016

**Brand:** seamaka
**Price:** € 21.86
**Availability:** ✅ In Stock

## Summary

> 🚀 Power Up Your Trailers with Seamaka's Ultimate Wiring Solution!

## Quick Answers

- **What is this?** 25ft 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, Trailer Wiring Harness with 18 Gauge White Ground Wire for Trailers O-016 by seamaka
- **How much does it cost?** € 21.86 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/455059499-25ft-4-wire-4-flat-trailer-light-wiring-harness-extension)

## Best For

- seamaka enthusiasts

## Why This Product

- Trusted seamaka brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable Design:** Crafted from heavy-duty materials to resist corrosion.
- • **Unmatched Length:** 25 feet of flexibility for all your trailer needs.
- • **Easy Installation:** Plug-and-play design saves you time and hassle.
- • **Reliable Connectivity:** 4-way flat plug ensures secure connections every time.
- • **Versatile Applications:** Perfect for marine, horse, motorcycle, and ATV trailers.

## Overview

The Seamaka 25ft 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit is designed for durability and versatility. Made from heavy-duty materials, this wiring harness is perfect for a variety of trailers, including marine, horse, motorcycle, and ATV trailers. With a 4-way flat plug connector, it ensures reliable power supply for tail lights, turn signals, and brake lights, making it an essential accessory for any trailer owner.

## Description

25ft 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, Trailer Wiring Harness with 18 Gauge White Ground Wire for Trailers O-016

## Features

- 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Seamaka |
| Connector Type | 4-way Flat Plug |
| Recommended Uses For Product | marine trailers, horse trailers, motorcycle trailers, ATV trailers, and other multi-purpose cargo trailer hitch devices |
| Color | 25ft 4 Wire 4-Flat |
| Connector Gender | Female |
| Shape | Flat |
| Number of Pins | 4 |
| Connectivity Technology | Flat-plug Connector |
| Number of Items | 1 |
| Manufacturer | Seamaka |
| Item Weight | 10.5 ounces |
| Package Dimensions | 6.14 x 4.21 x 1.97 inches |
| Manufacturer Part Number | O-016 |

## Images

![25ft 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, Trailer Wiring Harness with 18 Gauge White Ground Wire for Trailers O-016 - Image 1](https://m.media-amazon.com/images/I/51DBjXGXZTL.jpg)
![25ft 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, Trailer Wiring Harness with 18 Gauge White Ground Wire for Trailers O-016 - Image 2](https://m.media-amazon.com/images/I/61rdLBCJn0L.jpg)
![25ft 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, Trailer Wiring Harness with 18 Gauge White Ground Wire for Trailers O-016 - Image 3](https://m.media-amazon.com/images/I/61dnR5ekipL.jpg)
![25ft 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, Trailer Wiring Harness with 18 Gauge White Ground Wire for Trailers O-016 - Image 4](https://m.media-amazon.com/images/I/61+egT9G-sL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Works great.  Has tail light feeds for both sides .
  

*by K***R on Reviewed in the United States on May 17, 2024*

This has separate tail light wires for both side (brake and parking lights).  Some harnesses want you to run an additional wire across the trailer for parking lights.  Not here.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    It's a wiring kit
  

*by M***E on Reviewed in the United States on May 13, 2024*

It's a good kit, wire's could be thicker and some heat shrink connector's would be very nice for a water tight seal.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Wiring
  

*by R***. on Reviewed in the United States on June 24, 2024*

Perfect fit for my trailer. easy install

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.fr/products/455059499-25ft-4-wire-4-flat-trailer-light-wiring-harness-extension](https://www.desertcart.fr/products/455059499-25ft-4-wire-4-flat-trailer-light-wiring-harness-extension)

---

*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-01-23*