The Nexiq Universal PLC Adapter for Trailers is a must-have tool for any heavy-duty trucker. This device allows you to easily connect to any trailer to read and diagnose any issues quickly and accurately. With a simple connection, you can quickly identify and diagnose any electrical or mechanical problems, saving you time and money. This adapter also works with most major trailer brands, making it a versatile tool for any trucker. Get the most out of your trailer with the Nexiq