BCM Controller for MadJax Alpha Light KitThe small module that actually runs your Alpha body's LUX lighting — if your light kit stopped responding to the app, this is usually the part that failed, not the lights themselves.Fits: Club Car Precedent, Onward, Tempo with MadJax Alpha Body Kit and LUX Light Kit Before replacing this, it's worth checking your Bluetooth connection and app pairing first, since a surprising number of "dead" light kits turn out to be a pairing issue rather than a failed controller.