Fuse 9 (20a) in the engine fuse block is the correct fuse for the condenser fan hi and low speeds. Correct. There is no separate fuse for it. There is, however, a splice in that circuit where it split to both relays before going into the fuse block. Your assumption to my knowledge is correct, that fan should kick on when an A/C request is sent to the ECM, and also when your coolant temp reaches 220+ degrees. So, with that being said, since you say the fuse pops when you send an A/C request, there should be a problem between the fuse block and the relay. Possible short to ground, or even, that fan motor. To rule out the fan motor, I would simply get a 20a fuse with a jumper hooked it to, jump the relay while on the fan circuit, and see if it pulls more than 20a and blows your fuse.

-MIKE-

Stroked 2.2L