Discover the simplicity and accuracy of the Lite-Check 137 Truck and Trailer Output Tester. Designed for effortless use, this essential tool provides technicians with precise output readings for commercial trucks, trailers, and dollies. Simply attach the included 7-way cable and gladhands to the output receptacle of the vehicle, and the tester delivers accurate air and electrical readings on its clear 4.75” x 1.75” LCD screen.

Engineered for efficiency, the Lite-Check 137 ensures reliable diagnostics, helping you maintain optimal performance and safety. Streamline your testing process and trust Lite-Check for superior quality and dependability.