Thanks for the help. I just replaced my thermal sensor and fan still does not come on. The fuse is good and bike runs well.
Again I know this is an old Thread but I'm posting this for future use which may help someone in the future.
1st pull the fan fuse, take a VOM and look for 12v (w/ignition key in the off position). You should not see any reading on your meter from either side of the fuse receptical.
With fuse still removed turn the ignition switch on. You should see 12v coming from one of the two slots where the fuse fits in.
If you see 12vDC on one of the fuse slots, reinstall the fuse.
Next, remove the electrical plug from the Radiator Fan switch (Temp Sensor).
Once you have disconnected the electrical plug, One of the wires should be Brown/White, the other wire should be Blue. If your wire colors are different, it doesn't matter. Again you should see 12v using your VOM from one of the wires on the meter, the other lead to a good ground.
If you have voltage on one of the wires , proceed ahead:
Next short those two wires Blue and Brown/White together (on the plug) with a jumper, screw driver, what ever, your fan should now run.
If it doesn't run and you have followed the above procedures, then you have a fan issue.
The fan motor could be partially stuck/corroded and needs taken apart and cleaned or it's its defective.
To test the fan motor:
Hook your fan wires to a 12v battery source. Connect the Blue wire to Positive and the Black/Yellow to the Negative side of the battery. It should now run fast and free.