let me first say I don't have your car and I am not the world's greatest electrician either, but here is my attempt:
from your picture, it looks like the wire you have taken off brings the electricity to the switch, so I would test that for current. The other 2 should not have current. Then I assume the current will flow out through one of the other pins, depending on the temp. So I would test for continuity between the pin you have exposed now and the other 2. If you have zero resistance, that would mean that current would always flow through that wire (and that wire hopefully goes to the fan motor).
Your picture also seems to show some insulation missing to the right.
I hope I am not leading you into the wrong direction. Any other "electricians" out there feel free to chime in.