General description The AlwaysH 4 Pin Trailer Socket Tester is a 4-way flat trailer plug test device designed for checking the electrical functions of towed vehicles. It features LED indicator lights that help identify faulty areas in the wiring, making it an essential tool for maintaining safe and stable connections. Technical specifications Type: 4 pin flat trailer plug tester Material: Premium quality, wear-resistant, sturdy, and durable Design: Double-sided Usage The trailer wiring harness tester is easy to use: Insert the tester into the vehicle socket Turn on the LED signal to check the electrical functions LED lights indicate good signals for tail lights, brake lights, and turn signals Other information Lightweight and comfortable design with a rear end that can be hung on a key ring Suitable for all types of trailers, including boat trailers, horse trailers, ATV trailers, and cargo trailers Note: Manual measurements may allow for a 1-3cm error due to differences in light and