USA Harness, founded in 1991 in Winnsboro, Texas, specializes in manufacturing premium custom electrical wiring harnesses for commercial vehicle applications. Their products cater to a wide range of vehicles including heavy-duty dry vans, tank trailers, car haulers, and specialized vocational equipment. USA Harness designs custom wiring systems that meet or exceed industry standards, with a patented USA-PLUS system for advanced molded harness connections. The company's facilities in northeast Texas focus on product development, manufacturing, and engineering support, offering capabilities in tool and die making, plastic injection molding, and digital testing.