--- product_id: 646157512 title: "Trailer Wire Extension 4-Way 4 Pin Plug, 4 Wire 4-Flat Connector with Male & Female Plug 18 AWG 59 inch Hitch Light Trailer Wiring Harness Extender" brand: "mosleyz" price: "A$72" currency: AUD in_stock: true reviews_count: 5 category: "Mosleyz" url: https://www.desertcart.com.au/products/646157512-trailer-wire-extension-4-way-4-pin-plug-4-wire store_origin: AU region: Australia --- # Waterproof & dustproof casing 4-pin 18 AWG wiring 59-inch flexible extension Trailer Wire Extension 4-Way 4 Pin Plug, 4 Wire 4-Flat Connector with Male & Female Plug 18 AWG 59 inch Hitch Light Trailer Wiring Harness Extender **Brand:** mosleyz **Price:** A$72 **Availability:** ✅ In Stock ## Summary > 🔗 Connect with confidence—extend your reach, not your worries! ## Quick Answers - **What is this?** Trailer Wire Extension 4-Way 4 Pin Plug, 4 Wire 4-Flat Connector with Male & Female Plug 18 AWG 59 inch Hitch Light Trailer Wiring Harness Extender by mosleyz - **How much does it cost?** A$72 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/646157512-trailer-wire-extension-4-way-4-pin-plug-4-wire) ## Best For - mosleyz enthusiasts ## Why This Product - Trusted mosleyz brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Premium Conductivity:** Pure copper contacts ensure reliable, high-performance electrical flow every time - • **Plug & Play Precision:** Color-coded 18 AWG wires for foolproof, fast installation - • **Universal Compatibility:** Fits trailers, trucks, motorcycles, and ATVs—one harness to rule them all - • **Built to Brave the Elements:** Durable waterproof and dustproof silicone housing keeps connections safe rain or shine - • **Extended Reach, Zero Compromise:** 59-inch length gives you the freedom to connect trailers without hassle ## Overview The Mosleyz 4-Way 4-Pin Trailer Wire Extension is a 59-inch, 18 AWG color-coded wiring harness designed for seamless trailer light connections. Featuring waterproof, dustproof silicone housing and pure copper contacts, it ensures durable, safe, and reliable electrical performance across trailers, trucks, motorcycles, and ATVs. Engineered in the USA with a 4.8-star rating from over 500 users, this extension combines professional-grade quality with effortless installation. ## Description Features: Standard American car trailer cable with plug and socket for easy use and wide application, suitable for commercial vehicles, semi-trailers and trailers. Environmentally friendly plastic case, waterproof and dustproof, high security. Pure copper contact points, good electrical conductivity, sturdy and durable. This cable allows you to connect a 4-pin US plug on the vehicle to a 4-pin socket on a truck or towed item, and also acts as an extension cord to maintain a safe distance. Different colors of cable lines represent different signal lights, which are easy to install and practical. Item Type: Electrical Plug & Sockets Item Name: 4-pin Flat Plug with Socket Color: shown as picture Material: ABS+ copper Voltage: 6-24V Cable Length: 59in/ Wire gauge: 18*4AWG Package Size: 13.5 * 11 * 4cm / 5.3 * 4.3 * 1.6in Package Weight: 110g / 3.9oz Package Includes: 1 * 4-pin Flat Trailer Plug Wiring configuration: PIN 1-white wire (ground wire) PIN 2-brown wire (tail light and license plate light) PIN 3-yellow line (left / hand direction indicator) PIN 4-green line (right / horizontal indicator) Review: Great quality wire harness - Great quality harness! Works great so far! Review: Just what I needed - I have magnetic lights on my horse trailer and the 12" extension wouldn't reach when a friend borrowed the trailer. This solved the problem and the quality is as good as the shorter extension purchased at the farm store. ## Features - 1. 4-pin Trailer Light Wiring Harness, Special Design to Fit For Trailer LED Lights, Tailgate Light Bars and Other Use - 2. Premium Insulating Silicone Housing, Worry-free About Wiring Safety, Super Flexible and Durable - 3. Environmentally friendly plastic case, waterproof and dustproof, high security - 4.18 AWG COLOR CODED WIRES- Color coded 18 AWG wires clearly identify each wire's function; makes installation safe and straight-forward - 5. Used for All Types of Vehicles Like Trailer, Truck, Motorcycle Trailer, ATV Trailer. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0887SF6LV | | Brand | Mosleyz | | Brand Name | Mosleyz | | Country of Origin | USA | | Customer Reviews | 4.8 out of 5 stars 528 Reviews | | Manufacturer | Mosley Technology Inc | | Material | Co | | Material Type | Co | | Part Number | MOSTH25F | | Wire Diameter | 1.02 Millimetres | ## Product Details - **Brand:** Mosleyz - **Item Weight:** 0.11 Kilograms - **Manufacturer:** Mosley Technology Inc - **Material:** Co - **Wire Diameter:** 1.02 Millimetres ## Images ![Trailer Wire Extension 4-Way 4 Pin Plug, 4 Wire 4-Flat Connector with Male & Female Plug 18 AWG 59 inch Hitch Light Trailer Wiring Harness Extender - Image 1](https://m.media-amazon.com/images/I/6143vX48oTL.jpg) ![Trailer Wire Extension 4-Way 4 Pin Plug, 4 Wire 4-Flat Connector with Male & Female Plug 18 AWG 59 inch Hitch Light Trailer Wiring Harness Extender - Image 2](https://m.media-amazon.com/images/I/717957v9n5L.jpg) ![Trailer Wire Extension 4-Way 4 Pin Plug, 4 Wire 4-Flat Connector with Male & Female Plug 18 AWG 59 inch Hitch Light Trailer Wiring Harness Extender - Image 3](https://m.media-amazon.com/images/I/71fjVcK2eeL.jpg) ![Trailer Wire Extension 4-Way 4 Pin Plug, 4 Wire 4-Flat Connector with Male & Female Plug 18 AWG 59 inch Hitch Light Trailer Wiring Harness Extender - Image 4](https://m.media-amazon.com/images/I/71GNTsuZB4L.jpg) ![Trailer Wire Extension 4-Way 4 Pin Plug, 4 Wire 4-Flat Connector with Male & Female Plug 18 AWG 59 inch Hitch Light Trailer Wiring Harness Extender - Image 5](https://m.media-amazon.com/images/I/71+0zkpYJ0L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great quality wire harness *by B***4 on 6 October 2025* Great quality harness! Works great so far! ### ⭐⭐⭐⭐⭐ Just what I needed *by D***O on 5 September 2025* I have magnetic lights on my horse trailer and the 12" extension wouldn't reach when a friend borrowed the trailer. This solved the problem and the quality is as good as the shorter extension purchased at the farm store. ### ⭐⭐⭐⭐⭐ Great extension to reach trailer. *by A***R on 5 June 2026* Great link for extending to your trailer. ## Frequently Bought Together - Trailer Wire Extension 4-Way 4 Pin Plug, 4 Wire 4-Flat Connector with Male & Female Plug 18 AWG 59 inch Hitch Light Trailer Wiring Harness Extender - CURT 58030 Trailer-Side 4-Pin Flat Wiring Harness with 12-Inch Wires - Hopkins 47345 4 Wire Flat Adapter --- ## 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.com.au/products/646157512-trailer-wire-extension-4-way-4-pin-plug-4-wire](https://www.desertcart.com.au/products/646157512-trailer-wire-extension-4-way-4-pin-plug-4-wire) --- *Product available on Desertcart Australia* *Store origin: AU* *Last updated: 2026-07-06*