radiator fan to ec 250 2011

[dimtsam]

Hello everyone

Im trying to put a radiator fan to my bike ( ec 250 2011 without battery).
I got a rectifier from an other bike, but I got no fan running.
i found the yellow cable from the stator that is used for the lights. I found the white cable from the stator which is not connected somewhere. I connect both these wires to the rectifier but I got no dc.
Should i connect only the white cable to the rectifier?
Is the trailtech rectifier something special or any rectifier should do the job?
I ve done a lot of search but i think i miss something

Thanks for your time