I 've got a 03 360 4x4. The fan quit working on me recently. I tested the fan motor and it seems to be working fine. Is there a way to test the fan switch to see if that's the problem. Is this a common problem and if so is there a better solution than just replacing the fan switch.

 

At room temp, the fan switch should be open, >1 M ohm.
Around 153~163F, the switch should close, < 0.5 ohm, to make the circuit.
Also, check if there is 12V supply to the fan itself by measuring at the blue wire (+) of the fan and ground.
Good Luck.