I have a spal fan with the relay kit. The relay kit came with a switch but the thread is too big to fit in an e36 radiator. So I bought a 318ti radiator temp switch that has 3 pins.. My question is how do I connect it. Since the one from spal only has one pin and then a diagram to follow but a 318ti has 3 pins.. has anyone done this before and do you have a diagram pr pics.. Thanks in advance.. BTW this is for a s50 swap.