Join Date: Sep 2011
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Not sure on the specifics of the system.
See if you can find a wiring diagram and identify the components, wires, and path. A factory Honda Service Manual may have useful info also.
Something is blocking the power from reaching the fan - a bad sensor, broken wire, bad ground,etc.
A temporary fix would be a direct hot wire to the fan with a switch in-between that you could activate while riding if needed.