MaxxHaul MaxxHaul 50154 5-Way Trailer Wire Circuit Continuity Tester-2 Pack

These MaxxHaul testers are designed to test your wiring harness by simply plugging the tester inline between your tow vehicle and trailer, turn on your lights and check the easy to read LED indicator lights. Pin-point and trace the problem if it is on the tow vehicle or the trailer being towed. Simple plug-and-read design to allow you to effectively test your trailer lights harness saving you valuable time and money. Durable molded plug construction will handle different weather condition to provide many years of service. Compact design allows you to store in your tool box, glove compartment or anywhere to be ready when you need it.