Need Help Finding Thread

Hey guys, I would like some help finding a thread or a quick explanation on something. At winterfest 2019 I was talking to someone in a green xj about wiring a switch into the electric fan. I don’t remember his name or handle so I can’t contact him. But basically We we’re talking about how he wired in a switch to his electric fan so he could turn it on manually but it would still turn on through the relay by itself when the engine hits 180° or whatever it is. Does anyone know where this thread is or can someone explain how to do that right quick?? Thank you!!!

Disregard