The KC HiLiTES 6311 is a complete power-and-control kit for KC's FLEX ERA auxiliary lights. It bundles a 40-amp relay, an illuminated three-position rocker switch, fuses, and mounting hardware into one harness, so you don't have to source and assemble a separate relay loom. The 3-pin Deutsch connectors are weatherproof and mate directly with the light, which means fewer splices in the engine bay and a cleaner, factory-style installation. Per the manufacturer, the kit is sized for up to two 130-watt lights.
Compared with a generic relay kit, the 6311 is matched to the FLEX ERA light's connector and load, so you aren't guessing at wire gauge or connector pinout. The relay carries the lights' current instead of the dash switch, which keeps the switch circuit cooler and protects it from the full draw. If you're looking for a FLEX ERA 3-pin DT harness with a 40A relay and rocker switch for dual off-road lights, this is the kit built around that exact connector. Details vary by light model, so confirm compatibility with the manufacturer before ordering.
The manufacturer states the kit is designed to install up to two 130-watt FLEX ERA lights.
The manufacturer lists 12-gauge wire for the battery-to-relay run and 14-gauge wire for the ground, relay-to-light, and switch-to-relay runs.
The manufacturer's FLEX ERA harness documentation says the harness was designed for FLEX ERA lighting and does not guarantee fitment or performance for other applications.
Installation is primarily wiring rather than mechanical work. The manufacturer includes fuses and mounting hardware and describes the install as easy with a factory-finish appearance. Plan the route first: the battery lead goes to the relay, the relay feeds the lights, and the switch controls the relay. Owners on the manufacturer's product page have reported that the included leads can be short and may need extending, so measure the run from battery to light and to the dash switch before cutting anything. Basic tools for this job include a crimper, heat-shrink tubing, and a multimeter to confirm continuity and switch function before final mounting.
