T-H Marine LED Trailer Circuit Tester

T-H Marine Trailer Circuit Tester - Your boat trailer needs to be in good condition, so do your trailer lights. Check them with the Trailer Circuit Tester! This boat trailer circuit tester checks vehicle power for tail lights, turn signals, and brake lights. With a three-LED display (tail, LT, RT) and a four-way connector, you'll know if there's an issue anywhere in the circuit. 3-LED display: Tail, LT, RT 4-Way Connector Check vehicle power for tail lights turn signals and brake lights