Nking, I had to re-wire my mast. Here's how to figure out the wiring. First, if you don't have one, get a good digital multimeter (~$30 at Sears). A test will work, but you'll use the multimeter for a lot of your boat work. Second, clearly identify the sockets on the deck (female) side of the plug. Now, figure out which is which. Turn the anchor (mast) light on. This will make two of the sockets hot (reads 12volts) and two not. One of the "not hot" sockets is your ground. Put you negative lead into a socket, then work the positive lead around the other sockets. You shouldn't get any reading from the empty socket. If you're in the ground, you'll get readings on the two positive. If you're in a positive, you'll get one reading. Keep moving the negative lead to a different socket until you get two readings. MARK THE SOCKETS. Now go turn off the mast light and turn on the steaming light. Put the negative lead in the ground socket, and check which of your positive sockets is hot. That's your steaming light. Now that you've got the hull socket figured out, it's time for the mast. The best way to figure that out is to get a battery and test leads. Hook up the ground to the wire you think is ground and see if either of the other two lights something up. If nothing works, move the ground to the next wire. Once you start getting lights, clearly mark the wires, reassemble the plug and you're done.
