---
product_id: 13874037
title: "CURT 56225 Vehicle-Side Custom 4-Pin Trailer Wiring Harness"
brand: "curt"
price: "$124.01"
currency: USD
in_stock: true
reviews_count: 13
category: "Curt"
url: https://www.desertcart.us/products/13874037-curt-56225-vehicle-side-custom-4-pin-trailer-wiring-harness
store_origin: US
region: United States of America
---

# 4-pin plug & play no cutting or splicing dust cover protection CURT 56225 Vehicle-Side Custom 4-Pin Trailer Wiring Harness

**Brand:** curt
**Price:** $124.01
**Availability:** ✅ In Stock

## Summary

> 🔗 Hook up your trailer in minutes—because your adventure deserves zero downtime!

## Quick Answers

- **What is this?** CURT 56225 Vehicle-Side Custom 4-Pin Trailer Wiring Harness by curt
- **How much does it cost?** $124.01 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/13874037-curt-56225-vehicle-side-custom-4-pin-trailer-wiring-harness)

## Best For

- curt enthusiasts

## Why This Product

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

## Key Features

- • **Plug & Play Simplicity:** Instantly connects with your OEM socket—no tools, no hassle.
- • **Custom-Fit for Your Ride:** Tailored for Nissan Frontier, Pathfinder, Xterra & Suzuki Equator models.
- • **Stress-Free Towing Setup:** Engineered for quick install so you can hit the road faster and safer.
- • **Universal 4-Way Flat Output:** Seamlessly powers tail, brake, and turn signals for safe towing.
- • **Durability Meets Clean Design:** Includes dust cover to keep your connection pristine and reliable.

## Overview

The CURT 56225 Vehicle-Side Custom 4-Pin Trailer Wiring Harness offers a precision-fit, OEM-compatible plug-and-play solution for Nissan and Suzuki trucks. It provides a reliable 4-way flat connector for all essential trailer lights, includes a dust cover for protection, and eliminates the need for cutting or splicing wires, ensuring a clean, fast, and durable installation.

## Description

CURT custom wiring connectors are the easiest way to outfit your vehicle with a CURT trailer wiring connection. They are built with some of the most advanced technology in the industry, and each one is custom-fitted to work with a specific make and model. Some automotive manufacturers install a special socket on the vehicle to be used for vehicle-to-trailer wiring. Although this special socket is not equipped on every vehicle, a CURT custom wiring connector -- also called a T-connector -- utilizes the socket for simple, stress-free installation. Rather than requiring you to cut, splice and solder into your vehicle's wiring system, the custom wiring connector uses a single OEM-compatible plug and instantly provides a standard, universal vehicle-to-trailer wiring connection, typically in the form a 4-way flat. All CURT custom wiring connectors are made vehicle-specific for the easiest possible installation and the best fit. This particular plug-in connector provides a 4-way flat socket and is designed to be a custom wiring option for certain years of the Nissan Frontier, Nissan Pathfinder, Nissan Xterra and Suzuki Equator (to verify your vehicle compatibility, see application info). It comes with all necessary hardware to establish a solid connection. It also comes with a dust cover to keep the connector socket clean when not in use. To ensure long-lasting reliability, all CURT custom wiring connectors are thoroughly tested for optimal functionality. Stress is the last thing you should feel when towing a trailer -- whether you're hauling your RV to that favorite camping destination, your ATVs up to the hunting grounds or your fishing boat to the new hidden hotspot. At CURT, we think your towing equipment should add to the enjoyment of your experience, not detract from it.

Review: Easy - Easy to install. Perfect transaction
Review: Worked great for 2025 Nissan frontier. Would recommend - Installed on my 2025 Nissan frontier. Took about 15 minutes to install both the relay harness and the trailer harness combined. All the lights on my trailer work perfectly.

## Features

- Plugs into existing OEM vehicle socket to provide a 4-way flat socket
- Simple plug-and-play design eliminates the need for cutting or splicing
- 4-way flat output connects tail lights, brake lights and turn signals
- Dust cover included to keep connector clean when not in use
- Slit loom keeps wires contained and well protected

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00SZ5GOXY |
| Best Sellers Rank | #124,551 in Automotive ( See Top 100 in Automotive ) #263 in Towing Hitch Wiring |
| Brand | CURT |
| Connector Type | 4-way Flat |
| Customer Reviews | 4.7 4.7 out of 5 stars (739) |
| Date First Available | January 30, 2015 |
| Exterior | Painted |
| Global Trade Identification Number | 00612314562251 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 13.1 ounces |
| Item dimensions L x W x H | 9 x 6 x 3 inches |
| Item model number | 56225 |
| Manufacturer | Curt Manufacturing |
| Manufacturer Part Number | 56225 |
| Material | Plastic |
| Model | 56225 |
| OEM Part Number | 56225 |
| Product Dimensions | 9 x 6 x 3 inches |
| Recommended Uses For Product | trailer wiring |
| UPC | 612314562251 |

## Product Details

- **Brand:** CURT
- **Connector Type:** 4-way Flat
- **Item Weight:** 13.12 ounces
- **Item dimensions L x W x H:** 9 x 6 x 3 inches
- **Material:** Plastic

## Images

![CURT 56225 Vehicle-Side Custom 4-Pin Trailer Wiring Harness - Image 1](https://m.media-amazon.com/images/I/71enRjd-aqL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy
*by D***S on December 10, 2025*

Easy to install. Perfect transaction

### ⭐⭐⭐⭐⭐ Worked great for 2025 Nissan frontier. Would recommend
*by F***. on November 3, 2025*

Installed on my 2025 Nissan frontier. Took about 15 minutes to install both the relay harness and the trailer harness combined. All the lights on my trailer work perfectly.

### ⭐⭐⭐⭐⭐ Installation is quite simple
*by P***R on September 27, 2019*

I am 64 years old. In the old days, to install harnesses, one would need to locate, mark, strip/cut, and splice wires to rig a harness. This was amazingly simple. I had a hard time finding the 12 pin plug behind the kick plate. The plug was tucked behind the other plugs and had no flexibility to pull from the wall of the truck. However, it turned out to be very simple. The instructions that come with this package show various steps of progress. However, for a novice such as myself, the instructions were missing information. A quick online search for videos, explained the other steps and within no time, all was connected and mounted. My test light indicates all is working properly. My boat has been in the shop. I am assuming all will work upon connection. Knowing one's way around vehicles is also important. On my Frontier, the kick panel is accessed by prying off the sill at the bottom of the door. Then unscrewing the black plastic retainer holding the kick plate. This retainer is on the upper floor board under the glove box area. One must also understand how to disconnect auto wiring plugs without damaging the clips. Between installing my new hitch and this harness, I would estimate it took this idiot about 2 dedicated hours. A person that has the right knowledge could have installed the hitch and the harness in about 30 minutes.

## Frequently Bought Together

- Curt Manufacturing 56225 Vehicle-Side Custom 4-Pin Trailer Wiring Harness,Fits Select Nissan Frontier,Pathfinder,Xterra,Suzuki Equator,Black
- CURT 58301 Vehicle-Side Trailer Wiring Harness Mounting Bracket for 4-Way Flat GLOSS BLACK POWDER COAT

---

## 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.us/products/13874037-curt-56225-vehicle-side-custom-4-pin-trailer-wiring-harness](https://www.desertcart.us/products/13874037-curt-56225-vehicle-side-custom-4-pin-trailer-wiring-harness)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-11*