I meant to say a bad resistor is another possible cause in my previous post, and not a bad fuse. The resistor is located in the fan shroud, which allows the fan to run at a low speed. (See item 5 in the attached picture.)
FWIW, the cooling fan has 2 fuses and 2 relays. A 15A fuse(F40) for the coils on the low speed and high speed relays, and a 40A fuse(F3) for the contacts on the low speed and high speed relays. And the cooling fan would not run at all if either fuse failed, even when the A/C is turned on.