Four-Way Trailer Light Tester. Free Shipping

Plug this easy-to-use trailer light tester into your tow vehicle and the LEDs light up if the wiring is working correctly for quick and easy results. The light tester fits four-way flat plugs and a small, convenient size allows it to fit easily in your glove compartment or pocket. Test your right, left, tail and brake light wiring all with one handy Air Toollight tester!