When i was building my car up i changed the looms, on my current one there is no spare plugs around that area, apart from one which i think is for the cat temp sensor which is long gone. I'll switch a few about and see whats what. I had the oil pressure switch plug plugged into that black one, oops, which constantly had the oil light on. I still have my old looms, so im gonna see if i can find this wire on that. I set it with the idle screw on the throttle body. My idle control valve was spotless so was my throttle body, i also checked my throttle position sensor, but that was fine. As i said my throttle cable was too tight. Cant get my fan to work though, if i give it 12v and earth it works but its not turning on when the car is up to temp. Well halfway up the gauge.