well, the rad was fitted by an approved bmw garage. I think the sleeving for the temp sensor has the same compound, but I'll certainly investigate it. I'm 95% certain that those wires are related to the sensor, otherwise they'd be connected to something. They're not alarm wires (thats on the other side), and not to do with lights (as they all work). The only thing that doesn't work is the fan, and those are the only bare wires.
2 + 2 = ??