---
product_id: 270473574
title: "US to EU Trailer Light Converter US 4 Way to EU 7 Way Trailer Light Adapter USA Vehicle 4-Pin Flat Plug to European Trailer 7-Pin Round Connector Plug and Play Waterproof Converter"
brand: "oyviny"
price: "¥12109"
currency: JPY
in_stock: true
reviews_count: 6
category: "Oyviny"
url: https://www.desertcart.jp/products/270473574-us-to-eu-trailer-light-converter-us-4-way-to
store_origin: JP
region: Japan
---

# 12V DC reliable power output Waterproof & dustproof design 4-pin US to 7-pin EU conversion US to EU Trailer Light Converter US 4 Way to EU 7 Way Trailer Light Adapter USA Vehicle 4-Pin Flat Plug to European Trailer 7-Pin Round Connector Plug and Play Waterproof Converter

**Brand:** oyviny
**Price:** ¥12109
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect Globally, Drive Confidently – Your Trailer’s Best Travel Buddy!

## Quick Answers

- **What is this?** US to EU Trailer Light Converter US 4 Way to EU 7 Way Trailer Light Adapter USA Vehicle 4-Pin Flat Plug to European Trailer 7-Pin Round Connector Plug and Play Waterproof Converter by oyviny
- **How much does it cost?** ¥12109 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/270473574-us-to-eu-trailer-light-converter-us-4-way-to)

## Best For

- oyviny enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Travel-Ready:** Lightweight 0.35kg design with integrated cable management for easy storage and on-the-go use.
- • **Plug & Play Simplicity:** Zero cutting or splicing required—just plug in and hit the road with confidence.
- • **Built to Brave the Elements:** Durable ABS housing with waterproof sealing and spring-loaded dust cover keeps your connection pristine rain or shine.
- • **Optimized Signal Separation:** Separates stop and tail light signals perfectly for flawless trailer lighting compatibility.
- • **Seamless US to EU Trailer Sync:** Effortlessly convert your 4-way US flat plug to a 7-way European round connector—no wiring headaches.

## Overview

The Oyviny US to EU Trailer Light Converter is a rugged, waterproof adapter that converts a US 4-pin flat trailer plug to a European 7-pin round connector. Designed for hassle-free plug-and-play installation, it ensures reliable 12V DC power delivery and separates stop and tail signals for full trailer light compatibility. Its durable ABS housing and spring-loaded dust cover protect against weather and corrosion, making it an essential accessory for professionals bridging US vehicles with European trailers.

## Description

Product description Key Features Durable Construction US 4 way to EU 7 way trailer adapter shell and both 4 pin and 7 pin plugs are made from durable ABS plastic, Sturdy PVC wire housing is able to withstand weather elements and for long-lasting use. Great Conductivity European 7 way plug with brass terminal, standard US 4 way connector with Tin plated brass terminal; 7 pin connector equipped with a spring-loaded dust cover to protect the plug from rain and dust, ensure good conductivity. Plug and Play Plug and Play design minimize the hassle of installing any new wiring inside, no splicing or cutting needed, and there is no other adapters needed; Changing a US style 4-way flat plug to a European style 7-pin connector. US Vehicle 4 Pin Flat Socket to EU Trailer 7 Pin Plug You will need this USA 4-pin to European 7-pin trailer wiring adapter converter if your 4-way flat plug US vehicle need to separate the stop and tail signals, and your European trailer has the 7 pin round connector. Note: Please check the connectors of your vehicle and trailer are the same as this converter before purchasing, thank you! Package Included: 1 x US 4 Way to EU 7 Way Adapter

Review: Plug and play, just add screws to secure it. - I should have just gotten one of these adapters from the beginning, instead of doing a custom wiring job on my truck to add in the 7 round receptacle. Only downside is that the cables coming off the ends are super short, so you'll want to get a small 4 pin extension cable if you're bolting this to the trailer like I did.
Review: Plug and Play -love how Simple it is. - Reviewing few things at once. Love how simple and Plug n Play it is. Wireless Lights Connect Instantly within 2-3 seconds—-and Never drip signal—Looove it. The Euro to US converter just works Perfectly 7 to 7 pin and 4 pin US to 7 pin Euro—works as well Perfectly. Im using Test Box to simulate Trailer -everything came in just wana shoot video quickly before i forget...

## Features

- This US 4 way to EU 7 way Trailer Light Converter is designed for separating "stop" signal from the Two-Wire System USA Vehicle to connect your European Trailer (caravan, boat trailer, bike carriers and others)
- US 4-Way Flat Plug to EU 7-Way Round Connector constructed with integrated injection molding environmentally friendly plastic housing, it's waterproof and durable, and can be stored and extended to life when you are not using it
- European 7 Pin Trailer Connector equipped with a spring-loaded dust cover, which keeps connector clean when not in use, protects the brass terminal from rain and getting rust, ensure great conductivity
- Simple Plug and Play design makes easy installation, No Cutting or Splicing Required; Simply plug into the existing American style 4 way socket and European style 7 way connectors
- This US to EU trailer Light Converter used for converting a US style 4-way plug to a European style 7-way trailer, It provides an electrical solution if you have a 4 way US vehicle, and you want to hook up a 7 way round pin European trailer

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08N698D5C |
| Best Sellers Rank | #592,672 in Automotive ( See Top 100 in Automotive ) #525 in Trailer Connectors |
| Brand | Oyviny |
| Color | Black |
| Customer Reviews | 4.4 out of 5 stars 25 Reviews |
| Item Weight | 0.35 Kilograms |
| Manufacturer | Oyviny |
| Mfr Part Number | OV2114 |
| Model Number | OV2114 |
| Number of Outlets | 1 |
| Output Voltage | 12 Volts (DC) |
| Plug Format | Type B |
| Plug Type | Type B |
| UPC | 769894715376 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Oyviny
- **Item Weight:** 0.35 Kilograms
- **Output Voltage:** 12 Volts (DC)
- **Plug Format:** Type B
- **UPC:** 769894715376

## Images

![US to EU Trailer Light Converter US 4 Way to EU 7 Way Trailer Light Adapter USA Vehicle 4-Pin Flat Plug to European Trailer 7-Pin Round Connector Plug and Play Waterproof Converter - Image 1](https://m.media-amazon.com/images/I/71jaKilsmJL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Plug and play, just add screws to secure it.
*by B***R on April 25, 2026*

I should have just gotten one of these adapters from the beginning, instead of doing a custom wiring job on my truck to add in the 7 round receptacle. Only downside is that the cables coming off the ends are super short, so you'll want to get a small 4 pin extension cable if you're bolting this to the trailer like I did.

### ⭐⭐⭐⭐⭐ Plug and Play -love how Simple it is.
*by M***O on March 11, 2021*

Reviewing few things at once. Love how simple and Plug n Play it is. Wireless Lights Connect Instantly within 2-3 seconds—-and Never drip signal—Looove it. The Euro to US converter just works Perfectly 7 to 7 pin and 4 pin US to 7 pin Euro—works as well Perfectly. Im using Test Box to simulate Trailer -everything came in just wana shoot video quickly before i forget...

### ⭐⭐⭐ Bulky
*by E***S on August 6, 2022*

It’s bulky but works/ hey it’s been a while now and it is still working like day one!!! Great product!!!

## Frequently Bought Together

- Oyviny US to EU Trailer Light Converter US 4 Way to EU 7 Way Trailer Light Adapter USA Vehicle 4-Pin Flat Plug to European Trailer 7-Pin Round Connector Plug and Play Waterproof Converter
- Oyviny USA to EU Trailer Light Converter US Vehicle 7-Way Blade Socket Adapter to European Trailer 7-Pin Round Connector Plug and Play Trailer Converter Waterproof (Color:Black)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-04*