I also would love some clarification on this one... I see the same wires on my plug, but the wiring diagram I have shows only 1 black, 1 solid yellow, and a blue w/ red tracer, yellow w/ green tracer, yellow w/ black tracer and blue w/ white tracer.
If the wires on the plug were actually correct to what's on the diagram, it seems like it would be fairly easy to wire up the black and the yellow (most likely ground and 12v, respectively) and put spade terminals on the rest and just trial and error using the wiper switch until you get them right... That's only 16 combinations, so it wouldn't take long... But without knowing which one is the 12v constant, or even ground for that matter, you wouldn't want to trial and error the whole plug or you might deliver to much current somewhere...