motor controls

I am in the process of designing an Automatic Voltage Regulator (AVR) for a diesel generator's alternator, utilizing a microcontroller-based approach. Currently, I do not have access to the specific generator to provide detailed specifications, but my general design framework is as follows...

Hi there! Is it possible to use the yellow wire of this kitchen hood controls to power a relay to control a remote fan motor? I would like to keep the remote fan running on with any of the different speeds of the Exhaust fan. Thanks