A bit late on the reply, but having been there done that, just want to let you know that there are NO relays associated with the climate control. The clicking that you are hearing are the electically controlled vacuum valves (I guess you could call them relays) that control the dampers and such.

The fan is driven by a transistor regulator that provides the varable speed.

I don't know what your problem is (was hopefully), but I can tell you by experence, that without the diagram and service info you most likely are wasting a lot of time (short of replacing the fuses for the hell of it).

Even though the diagram on the CD is very bad, with a little insite you can fill in the lines and track down the problem with your trusty DVM.

- Mike