Allows the connection of an LED indicator, to any SmartCraft-equipped boat (sterndrives or outboards). The adapter will maintain the isolated PCM grounds and allow normal engine operation (no faults or Guardian modes). With the Adapter you will be able to have the LED indicator and have the trim visible on VesselView or a Garmin/Simrad display. No wires to splice or crimp, it all plugs in to the Mercury harness.