---
product_id: 526183811
title: "4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness"
brand: "nilight"
price: "₩46604"
currency: KRW
in_stock: true
reviews_count: 13
category: "Nilight"
url: https://www.desertcart.kr/products/526183811-4-way-flat-to-7-way-round-blade-trailer-adapter
store_origin: KR
region: South Korea
---

# 4-pin to 7-pin seamless power transfer Includes mounting bracket & hardware Rust-resistant, dustproof sealed cover 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness

**Brand:** nilight
**Price:** ₩46604
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect with Confidence, Tow with Style!

## Quick Answers

- **What is this?** 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness by nilight
- **How much does it cost?** ₩46604 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/526183811-4-way-flat-to-7-way-round-blade-trailer-adapter)

## Best For

- nilight enthusiasts

## Why This Product

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

## Key Features

- • **Rock-Solid Connection:** No wiggle-room or loose fittings—ensures reliable signal and power transfer every time.
- • **Universal Compatibility:** Perfect for RVs, trucks, caravans, and semitrailers—upgrade your towing game with confidence.
- • **Complete Installation Kit:** Mounting bracket, screws, and nuts included for a hassle-free, secure setup on any trailer hitch or bumper.
- • **Built to Brave the Elements:** Heavy-duty plastic housing with spring-loaded cover protects against dust, moisture, and corrosion.
- • **Plug & Play Power Conversion:** Effortlessly convert your 4-way flat socket to a 7-way round blade for full trailer functionality.

## Overview

The Nilight 4-Way Flat to 7-Way Round Blade Trailer Adapter is a durable, easy-to-install wiring harness that converts a 4-pin flat vehicle socket to a 7-pin round blade trailer plug. Featuring a rust-resistant plastic build and a sealed cover for protection, it includes a mounting bracket and hardware for secure attachment. Ideal for RVs, trucks, and trailers, it ensures reliable power and signal transfer for turn signals, brakes, reverse lights, and auxiliary power, backed by a 2-year warranty.

## Description

Nilight Trailer Plug AdapterNilight 4-Way Flat to 7-Way Round Blade Trailer Adapter with Mounting Bracket for RV Truck Factory Tow Package is made to convert 4-way flat vehicle end to 7-way blade trailer end, makes the tight connection between vehicle socket and trailer plug, no wiggle-room, no loose fittings. Transfers the power from the vehicle to the trailer. Package Included: 1 x Trailer Adapter Plug, 1 x Mounting bracket 6 screws & 6 nuts, 1 x User Manual.

Review: Works Perfectly - Easy Installation, Comes complete with everything needed to convert any Vehicles 4 Way Flat to a 7 Way Round for bigger trailer plugs. You can also very easily still use your 4 Way Flat by simply unplugging your adapter. I had to purchase due to the lack of other adapters having the mounting bracket which is very well made and extremely sturdy. I’m very satisfied with this purchase.
Review: High quality and great value...!!! - This item works perfectly and is literally plug and play. It is high quality and also a great value..! I compared this item at a local retail store where it is sells for double the price that it is on desertcart.

## Features

- Compact Traction Adapter: This adapter converts 4 way flat vehicle end to 7 way blade trailer end, makes tight connection between vehicle socket and trailer plug, no wiggle-room, no loose fittings. Transfers the power from the vehicle to trailer.
- Function: 4-pin flat socket designed to be converted to the 7-pin blade round type socket. Works on most vehicle wiring component like turn signals, brakes,reverse light and auxiliary power.
- Durable Construction: Heavy duty black plastic construction prevents rusting, enhances appearance. Well sealed spring loaded cover increases protection against dust, moisture and corrosion. Protects the inner contacts from rust or damage. The black wire loom keeps the wiring contained and protects the harness for long lasting use.
- Easy to Install: The 4 way to 7 way trailer adapter equipped with mounting bracket, screws, and nuts,conveniently connect the trailer wiring adapter to your trailer hitch or bumper and just find the right position to install and tighten the nut to install successfully.
- Wide Application: Come with 1 x Trailer Adapter Plug, 1 x Mounting bracket 6 screws & 6 nuts, 1 x User Manual. Perfect for most trailers, semitrailers, caravans, RV. Commonly used with T-connectors or tail lamp converters with 4-way flat car end connections

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BWD8F5MP |
| Best Sellers Rank | #2,314 in Automotive ( See Top 100 in Automotive ) #10 in Trailer Connectors |
| Brand | Nilight |
| Brand Name | Nilight |
| Cable Type | Trailer Wiring Harness |
| Connector Type | 4-way Flat to 7-way Round Blade |
| Customer Reviews | 4.7 out of 5 stars 574 Reviews |
| EU Spare Part Availability Duration | 2 Years |
| Global Trade Identification Number | 00840323903363 |
| Included Components | 1PC 4-Way Flat to 7-Way Round Blade Trailer Adapter |
| Item Type Name | 4-Way Flat to 7-Way Round Blade Trailer Adapter |
| Item Weight | 0.29 Kilograms |
| Manufacturer | Nilight |
| Material | Plastic |
| Material Type | Plastic |
| Model | 50303T |
| Number of Items | 1 |
| Part Number | 50303T |
| UPC | 840323903363 |
| Unit Count | 1.0 Count |
| Warranty Description | 2 Year Warranty |

## Product Details

- **Brand:** Nilight
- **Connector Type:** 4-way Flat to 7-way Round Blade
- **EU Spare Part Availability Duration:** 2 Years
- **Item Weight:** 0.29 Kilograms
- **Material:** Plastic

## Images

![4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness - Image 1](https://m.media-amazon.com/images/I/610KZWiUvsL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works Perfectly
*by J***D on May 3, 2026*

Easy Installation, Comes complete with everything needed to convert any Vehicles 4 Way Flat to a 7 Way Round for bigger trailer plugs. You can also very easily still use your 4 Way Flat by simply unplugging your adapter. I had to purchase due to the lack of other adapters having the mounting bracket which is very well made and extremely sturdy. I’m very satisfied with this purchase.

### ⭐⭐⭐⭐⭐ High quality and great value...!!!
*by E***M on May 1, 2026*

This item works perfectly and is literally plug and play. It is high quality and also a great value..! I compared this item at a local retail store where it is sells for double the price that it is on Amazon.

### ⭐⭐⭐⭐⭐ hard to find at a good price
*by M***R on November 21, 2025*

This wiring harness adapter worked great. Attached to both the trailer plug and the tow vehicle plug without difficulty. It is hard to find a 4 flat adapter with a hole for the ground and prongs for the lights which our vehicle plug took. Both ends fit just right. The adapter looks good. The harness feels like it has quality wires and appears to be made to last. I would recommend this adapter harness to anyone who is in the market for this type of connecter. Mike

## Frequently Bought Together

- Nilight 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness 4 Pin to 7 Pin Electrical Connector Wiring Plug Connector with Mounting Bracket for RV Truck Factory Tow Package,2 Years Warranty
- Reese Towpower 8507111 Brakeman IV Digital Brake Control, Small Compact Design
- MECMO Multi-Tow 4-Way Flat to 7-Way RV Blade and 4-Way Flat Female Trailer Wiring Adapter Connector Kit, Adapt 4-Way Flat Vehicle-Side Socket to Multiple Trailer Plugs with Mounting Bracket

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**Shop now:** [https://www.desertcart.kr/products/526183811-4-way-flat-to-7-way-round-blade-trailer-adapter](https://www.desertcart.kr/products/526183811-4-way-flat-to-7-way-round-blade-trailer-adapter)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-07-27*