Originally Posted by pizzaguy

Now, wait. You replaced the fan MOTOR, right? If the motor is new and power it reaching it via the control module, then the new motor is bad.

Disconnect the fan motor harness from the rest of the harness - get some reasonably heavy wire, two pieces, and strip both ends. Jumper directly from the battery + and - posts to the two terminals of the fan motor and PROVE that motor is good. If it runs, I'd say your fan module is bad or a fuse is blown.

If ANYTHING else is wrong (say the ECM is not talking to the Fan Module) the Fan Module will go into "emergency mode" and turn the fan on full speed.

IF the fan motor refuses to run (and it runs at low speed whenEVER the A/C is on) - It has to be the fan motor, fan control module or fuse. There are no other options.