yeah, currently my fan is wired so the trigger wire goes to a relay.
my computer supplies ground to that relay turning on the fan.

You will have to let me know what you need to turn it off and on via your controler instead, and I will rewire accordingly, but my plan was to take the trigger wire off and put it to your controler, and then the ground signal from the computer to your controler, or the power signal from that relay to your controler.

I might be able to wire a temp switch to it,not sure. if you send the one you tested with, I will pull one of my sensors for the dash and put it in to make sure it works.