Can someone please explain how the OEM fans should be wired?

Is it live to the fans > fans to the switch > switch back to the fans

and obviously when the temp rises the switch opens and makes the circuit????

Or is it a 2 stage switch?? Does it go to a relay??

I could do with seeing a proper diagram really.....


At somepoint my cars had a manual switch wired in which im trying to remove, but its a headache working out what other people have done??