If you are removing the fuse, it shouldn't run. That indicates you have a short to power. When the key is on, another circuit is powering the fan. That is what I believe is happening on your findings.
Check as much of the wiring near the fan and make sure there is nothing wrong or causing this to happen. If you find nothing, then we need to remove one fuse at a time to see when the fan stops. At that point, we will at least know the circuit that is causing the problem. I will then look through schematics to see if I can locate areas where the two systems are close.
Let me know.
Friday, August 14th, 2020 AT 12:21 PM