Can you tell me what wires you shorted together and how to test this system. I pulled off a plug between the air intake and the radiator and tried to short the pins (two on left, one on right) but the aux fan did not start. Is this the same thing you did and which pins did you connect. Also, what does the temp sensor by the cruise control look like and where is it? I just got my car recently and want to test that this was all hooked up properly (after new radiator installed in '98). I will try the relay trick, as well.
00 A4 2.8Q