The small circled numbers represent the wire number on the diagram. The large table at the upper right of the wiring diagram shows the wire number and it's corresponding colour. The small table translates the colour into English.
Small 31=G=yellow (which is 12VAC)
Note that the larger circled numbers refer to connection points and some are shown in more detail at the bottom of the diagram. Anything that has a "U" refers to a grouped connection (union).
Large number 23 and large number 31 are NOT connected. One of these is your dangling yellow wire.
Also think of the wiring for it's function, not just the colours shown on the diagram. Some colours on the diagram are not the same as the wire colour. They can't show a white wire as white or it wouldn't show up against the white background. The diagram is showing what the electrical connections actually are. Look at small number 60, it shows as a red wire that connects to a yellow/green junction point. What this says is that it creates a ground point halfway up the winding. It would make more sense if they made it yellow/green but we can tell what it does by knowing the function.
The second large table column represents the wire size in mm2. 0.75 is an average size. 0.5 is lighter, 1.0 is heavier. This can help if you notice a wire size difference.
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2011 EC250E
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