Thanks a lot!!Disconect the battery,disconect the fan, test if the diode next to fan is shorted to ground on both sides(on some revisions is not present), if is shorted , remove the diode and test, if is not shorted connect the fan and test again the diode, if now is shorted the fan is faulty.
I've remove the diode, after test it, and the fan work correctly!
Great help, thank you so much!