---
product_id: 526183811
title: "Nilight 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness 4 Pin to 7 Pin Electrical Connect Wiring Plug Connector with Mounting Bracket for RV Truck Factory Tow Package"
brand: "nilight"
price: "3940 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "Nilight"
url: https://www.desertcart.is/products/526183811-nilight-4-way-flat-to-7-way-round-blade-trailer
store_origin: IS
region: Iceland
---

# 4-pin to 7-pin seamless power transfer Includes mounting bracket & hardware Rustproof, dust & moisture sealed Nilight 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness 4 Pin to 7 Pin Electrical Connect Wiring Plug Connector with Mounting Bracket for RV Truck Factory Tow Package

**Brand:** nilight
**Price:** 3940 kr
**Availability:** ✅ In Stock

## Summary

> 🚛 Connect with Confidence — Power Your Tow Like a Pro!

## Quick Answers

- **What is this?** Nilight 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness 4 Pin to 7 Pin Electrical Connect Wiring Plug Connector with Mounting Bracket for RV Truck Factory Tow Package by nilight
- **How much does it cost?** 3940 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/526183811-nilight-4-way-flat-to-7-way-round-blade-trailer)

## 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

- • **All-in-One Kit:** Includes trailer adapter plug, mounting hardware, and user manual—everything you need to upgrade your towing setup today.
- • **Built to Endure:** Heavy-duty black plastic housing with spring-loaded cover protects against rust, dust, and moisture—engineered for longevity.
- • **Effortless Installation:** Comes complete with mounting bracket, screws, and nuts for a secure, no-fuss setup on any RV or truck tow package.
- • **Universal Compatibility:** Designed to work seamlessly with most trailers, caravans, and semitrailers featuring 4-way flat vehicle sockets.
- • **Precision Power Conversion:** Flawless 4-way flat to 7-way round blade connection eliminates wiggle-room and loose fittings for reliable trailer control.

## Overview

The Nilight 4-Way Flat to 7-Way Round Blade Trailer Adapter is a durable, rust-resistant wiring harness that converts a 4-pin flat vehicle socket to a 7-pin round blade trailer plug. Designed for secure, no-wiggle connections, it transfers power for turn signals, brakes, reverse lights, and auxiliary power. The kit includes a mounting bracket with screws and nuts for easy installation, making it ideal for RVs, trucks, and trailers requiring reliable electrical connectivity.

## 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: hard to find at a good price - 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
Review: Good product - Works great 5 stars. Durable . Fast shipping

## 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 | #3,455 in Automotive ( See Top 100 in Automotive ) #7 in Trailer Connectors |
| Brand | Nilight |
| Connector Type | 4-way Flat to 7-way Round Blade |
| Date First Available | February 21, 2023 |
| Global Trade Identification Number | 00840323903363 |
| Item Weight | 10.2 ounces |
| Item model number | 50303T |
| Manufacturer | Nilight |
| Material | Plastic |
| Package Dimensions | 6.3 x 3.66 x 3.15 inches |
| UPC | 840323903363 |

## Product Details

- **Brand:** Nilight
- **Connector Type:** 4-way Flat to 7-way Round Blade
- **Item Weight:** 0.29 Kilograms
- **Manufacturer:** Nilight
- **Material:** Plastic

## Images

![Nilight 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness 4 Pin to 7 Pin Electrical Connect Wiring Plug Connector with Mounting Bracket for RV Truck Factory Tow Package - Image 1](https://m.media-amazon.com/images/I/610KZWiUvsL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 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

### ⭐⭐⭐⭐⭐ Good product
*by S***R on February 19, 2026*

Works great 5 stars. Durable . Fast shipping

### ⭐⭐⭐⭐⭐ Excellent ~ Works great, great price, great value !
*by J***. on October 19, 2025*

Excellent ~ Works great, great price, great value... easy to mount and connect.

## 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
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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-07*