I can’t figure out how my new led combo deck/mast light wires up. The light has three wires; white, red, and black. Coming out of the mast is a white, green, and black. This harness came from CD and worked previously with the old incandescent fixture. Inside the cabin is a switch for each light. The switch fuses are not blown. I’ve checked that the new light fixture is working: When I touch its red and black wires directly to the battery, the steaming light is on. When I add the fixture’s white wire with its red on the battery, both deck and steaming is on.