I just replaced the water pump in my '79 323 and in the process, of course, had to pull the radiator. Being the hasty person that I am, I forgot to label a couple of the wires going to the ?temperature? sensors on the left side of the radiator. I've heard that the wiring diagrams and such for the euro e21's are hard to get ahold of, but since this discussion group exists I thought someone could tell me what these sensors do and what lead goes where. I have the bottom one wired right, I just don't know which terminal the brown wire goes to on the top sensor.