1993 Audi 90 radiator fan runs continuously

Ok - this may sound stupid but when I opened the relay box, it appears to be missing some of the relays - and specifically some of those relating to the cooling fan. I don't think anyone removed them recently either. Is it normal to have open spots? And when you say switch sides - can you be more specific? Thanks much.

Ok - so Ive located that panel. How would I know if the switch is stuck? #2 and #11 are empty. Or am I looking for another one on or near the radiator? I am a bit of a novice as you can see. :-)

So I pulled each one of them when the car was being jumped and kept coming back and forth testing different combinations, but the fan continued even when both the 3 and 6 were pulled - together and separate. I would have expected the fan to stop altogether at some point - with the switch removed yes?

Ok - so any idea how a novice would be able to fix that? Or should I bring it to a service center? Also, what should be the approximate cost to do so? Thanks for all your help.

Do you happen to have the wiring diagram for this model that I could see on this site? Also, is it possible that the run on fan switch needs replacing? Is there a way to test that?

So I fixed the problem - was actually a different relay than the originial one suspected. It was the run-on fan switch relay which was stuck. This relay is found in the relay box under the driver side dash.

There is one other small issue I would like to bounce off of you though if possible. When the climate control is turned on, there is no air flow when the fan is switched on at 1 or 2. When turned to 3 or 4, however, the fan does run and blows at the appropriate speed. Any ideas?