Dongguan Kaweei Electronic Co., Ltd. is a China-based manufacturer and factory that specializes in producing high-quality and durable 4 pin trailer wiring harnesses. Our product is specially designed to connect the taillights, brake lights, and turn signals of your trailer to your vehicle's electrical system, ensuring that your trailer is roadworthy and visible to other drivers. Our 4 pin trailer wiring harness is made using top-quality materials and state-of-the-art technology to ensure reliability and longevity. We understand that safety is paramount when it comes to trailers, which is why our harnesses are rigorously tested to ensure that they meet the highest safety standards. At Dongguan Kaweei Electronic Co., Ltd., we are committed to providing our customers with top-quality products that they can trust. Whether you're a professional mechanic or a DIY enthusiast, our 4 pin trailer wiring harness is a must-have for anyone who wants to ensure that their trailer is roadworthy and safe. Contact us today to learn more about our product and how we can help you.