Test trailer lights, brakes, and 12V circuits—no truck needed. Built for 7-way round pin trailers. Rugged, water-resistant, and made in the USA.
We designed this test box as an aid for testing trailer lights and electric brakes. It allows one person to visually test brake lights, tail lights, right and left turn signal lights and electric brakes.
Trailer light testers from Northern Tool offer a simple and convenient way to quickly access and troubleshoot the electrical system of a trailer or tow vehicle. With our trailer light testers, you will never have to guess if you have the proper wiring for your trailer or tow vehicle.
It allows one person to visually test brake lights, tail lights, right and left turn signal lights and electric brakes by simply connecting the test box to the front of the trailer and taking the hand held control unit to the rear of the trailer to test and make repairs as needed.
The Smart MUTT® is a Portable Trailer Light Tester for the Mobile and Commercial Trailer Repair Technician. Built to facilitate a one-man testing operation, the Smart MUTT ® reduces guesswork and inspection time to prevent electrical failures that lead to expensive road calls and citations.