Editorial Review This 11' wiring harness is designed to connect a single LED light to your 12V electrical system. It features battery terminals on one end and a Deutsch connector on the other to connect to the light. It incorporates an inline fuse holder, a 12V relay, and a waterproof switch. This harness is compatible with the following Rigid Industries LED Lights: Dually (Single), D2 (Single), 4 inch E-Series, 6 inch E-Series, 4 inch SR-Series, 6 inch SR-Series.