I did some searching , usually I can find stuff ... Unfortunately , I was unable to locate a Service Manual for it , without buying one .... So at this point I am afraid that will be your only solution is to buy the Honda Service Manual for it , as the Owners Manual does not have a Wiring Diagram ..
The only other suggestion I could offer is to use a Ohm Meter , and put it on Continuity (hopefully with a sound) and stick one end of the probe on the wire , and then start touching the wires at each connection , till you find it , if you are looking at or near the Stator or the Shift Position Sensor (not sure if that model has one or not) , and you should be able to trace it to its source on the engine itself , and/or count the connectors on the plug where the wire exits the loom/connector , then see if another plug matches that configuration (if it is a single wire/plug it should be easily traced) ..... That is about all I can come up with at this point ....
