Wuyaoyao 2PCS 4 Pin Trailer Tester Connector, 4-Way Straight Trailer Wiring Tester with LED Indicators, Flat Trailers Plug Light Circuit Testers for Brake, Turn, Tail Lights, Car Accessories (2 PCS)

Wuyaoyao 2PCS 4 Pin Trailer Tester Connector, 4-Way Straight Trailer Wiring Tester with LED Indicators, Flat Trailers Plug Light Circuit Testers for Brake, Turn, Tail Lights, Car Accessories (2 PCS)

• 【Main Function】: This 4-pin trailer plug tester quickly checks trailer light circuits, verifying proper operation of tail lights, right turn/brake, and left turn/brake lights. It features clear, intuitive LED indicators that can accurately display circuit continuity.
• 【Reliable Quality】: Made of durable plastic housing and copper pins, it offers wear and corrosion resistance for long-term use without damage, maintaining excellent contact performance. And it is stable, providing reliable testing support in various environments.
• 【Easy to Use】: It is plug-and-play, easy to use. Simply insert it into the vehicle's corresponding interface, then operate the trailer's tail lights, turn signals, and brakes in sequence. A lit green light indicates the circuit is energized and functioning correctly.
• 【Wide Application】: Operating at DC 6V-24V, our tester suits most vehicles including cars, RVs, SUVs, trucks, trailers, boats, campers, caravans, and other towed vehicles. It delivers convenience and peace of mind for both daily maintenance and outdoor trips.
• 【Portable Design】: Our trailer tester is compact in size, so it can be stored in a car glove compartment, pocket, or toolbox without taking up much space. It also features a hanging hole, allowing you to attach it to a keychain for easy access and portability.