I'm no expert at wiring/using relays but about those numbers on the bottom of the relay... from memory there should be a diagram etched onto the side of the relay showing the pinout numbers and their function.

The wire colours for aftermarket stuff is pretty much irrelevant. People tend to use what ever wire they have laying around to wire things up. Just look for the main wires coming from the fan. One should be red or white or yellow or something which would be a main power wire and one should be black or brown or some dark colour for ground. Then work your way back from there.