--- product_id: 531667978 title: "Gonice 25Ft 4 Pin Trailer Wiring Harness Extension Kit, 4-Way Flat Plug, 5-Wire Male & 4-Wire Female Connector with 18 Gauge White Ground" brand: "gonice" price: "€ 21.48" currency: EUR in_stock: true reviews_count: 8 category: "Gonice" url: https://www.desertcart.sk/products/531667978-gonice-25ft-4-pin-trailer-wiring-harness-extension-kit-4 store_origin: SK region: Slovakia --- # 18-gauge pure copper wire with tin plating for max conductivity 25 ft total length for versatile reach 4-way flat plug with 5-wire male & 4-wire female connectors Gonice 25Ft 4 Pin Trailer Wiring Harness Extension Kit, 4-Way Flat Plug, 5-Wire Male & 4-Wire Female Connector with 18 Gauge White Ground **Brand:** gonice **Price:** € 21.48 **Availability:** ✅ In Stock ## Summary > 🔗 Connect with confidence—power your trailer like a pro! ## Quick Answers - **What is this?** Gonice 25Ft 4 Pin Trailer Wiring Harness Extension Kit, 4-Way Flat Plug, 5-Wire Male & 4-Wire Female Connector with 18 Gauge White Ground by gonice - **How much does it cost?** € 21.48 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/531667978-gonice-25ft-4-pin-trailer-wiring-harness-extension-kit-4) ## Best For - gonice enthusiasts ## Why This Product - Trusted gonice brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Simplicity:** Quick-connect 4-way flat plugs with color-coded wires for hassle-free installation. - • **Universal Compatibility:** Works seamlessly with all standard 4-pin flat trailer connectors for marine, horse, and cargo trailers. - • **Built to Brave the Elements:** Premium copper core with tin plating and PVC jacket ensures corrosion resistance—even in sea water. - • **Precision Wiring for Safety:** Color-coded 5-wire male and 4-wire female connectors guarantee flawless signal transmission every time. - • **Extended Reach, Zero Compromise:** 25 ft wiring harness designed to cover wide trailers up to 80" effortlessly. ## Overview The Gonice 25Ft 4 Pin Trailer Wiring Harness Extension Kit features a durable 18-gauge pure copper wire with tin plating for superior conductivity and corrosion resistance. Its 4-way flat plug design includes a 5-wire male and 4-wire female connector with color-coded wiring for easy installation. Perfectly suited for trailers up to 80" wide, this kit ensures reliable lighting and braking signals across marine, horse, and cargo trailers. ## Description Buy Gonice 25Ft 4 Pin Trailer Wiring Harness Extension Kit, 4-Way Flat Plug, 5-Wire Male & 4-Wire Female Connector with 18 Gauge White Ground: Wiring Harnesses - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Lights are a go - Perfect wiring kit for my trailer. Simply awesome Review: good value - was just what i needed without running around town to get ## Features - Wire Length Details- Our 4-way trailer wiring harness includes 4 pin 21.65ft male & 3.94ft female extension connector and Install the accessory kit. this 25 ft trailer wiring harness is made of 18-gauge wire, designed to split at the trailer tongue and run down each side of the trailer. - Durable & Corrosion Resistant- The use of high quality pure copper wire and tin plated layer to achieve the best electrical conductivity and oxidation resistance, and the use of high quality PVC material for the best anti-corrosion and anti-aging ability. Work perfectly even with sea water. - Connect quickly- Male plug with 5 wires, female plug with 4 wires. And you can install the trailer wire so quickly and easily through the 4-way connectors and Matching installation accessories. It matches with any other standard 4 pin flat plugs. - Wire Connect Tips- Wires are color coded and bonded, Green- Right Turn Lights/Brakes, Yellow- Left Turn Lights/Brakes, Brown- Tail Lights/Running Lights, White-Ground Wire. - Wide Application- The trailer wiring harness is suitable for under 80" wide trailers, such as marine boat trailer, horse trailer and other cargo utility trailer. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BQM6YMMS | | Best Sellers Rank | #11,913 in Automotive ( See Top 100 in Automotive ) #26 in Automotive Replacement Electrical Wiring Harnesses | | Brand | Gonice | | Brand Name | Gonice | | Cable Type | Trailer Wiring Harness | | Connector Type | Flat 4-way | | Customer Reviews | 4.6 out of 5 stars 977 Reviews | | Item Weight | 0.29 kg | | Manufacturer | Gonice | | Material | Copper | | Material Type | Copper | | Model | TCX-25 | | Number of Items | 1 | | Part Number | TCX-25 | | Unit Count | 1 Count | | Wire Diameter | 1.02 millimeters | ## Product Details - **Brand:** Gonice - **Material:** Copper - **Item Weight:** 0.29 Kilograms - **Cable Type:** Trailer Wiring Harness - **Connector Type:** Flat 4-way ## Images ![Gonice 25Ft 4 Pin Trailer Wiring Harness Extension Kit, 4-Way Flat Plug, 5-Wire Male & 4-Wire Female Connector with 18 Gauge White Ground - Image 1](https://m.media-amazon.com/images/I/719Z0olQ4qL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Lights are a go *by J***N on August 20, 2026* Perfect wiring kit for my trailer. Simply awesome ### ⭐⭐⭐⭐⭐ good value *by C***C on June 25, 2026* was just what i needed without running around town to get ### ⭐⭐⭐⭐⭐ Best trailer wiring on Amazon *by K***N on October 17, 2025* Works perfect, very nice thick coated cables. Solid construction. No complaints, and way better than the other garbage. Bought this twice and will by for every trailer for now on. Length is good enough for most trailers I used it for my 4x8 folding trailer with an a frame tongue and had about 4 or 5 feet left if you run it down the center of the trailer you’ll have more but I ran mine through the rails in the side. Also the 4pin connector is sheathed so if it protects your vehicle wiring harness. ## Frequently Bought Together - Gonice 25Ft 4 Pin Trailer Wiring Harness Extension Kit, 4-Way Flat Plug, 5-Wire Male & 4-Wire Female Connector with 18 Gauge White Ground Wire - Partsam 12V Submersible Square Led Trailer Light,Red White LED Stop Turn Tail License Brake Running Light Lamp for Trailers Under 80" Boat Trailer Truck Marine Camper RV Snowmobile,IP68,DOT Compliant - Hopkins 7 Blade to 4 Wire Flat Vehicle To Trailer Connector Adapter Plug, Universal Fit for Vehicles with 7 Blade Adapters (47345) --- ## 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.sk/products/531667978-gonice-25ft-4-pin-trailer-wiring-harness-extension-kit-4](https://www.desertcart.sk/products/531667978-gonice-25ft-4-pin-trailer-wiring-harness-extension-kit-4) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-09-19*