Hi everyone! This took me a millenia to solve this myself, so I hope this helps someone else.

If you're running Windows 10 and trying to play with a Logitech racing wheel, you might well find that the wheel isn't being detected by American Truck Simulator. That being said though, the Windows control panel as well as the Logitech Profiler will show the controller as fully functional. So what's the deal? Steam's broken.

All you need to do to fix it is to go into Steam ⇨ Steam Settings ⇨ Controller ⇨ General Controller Setttings then unclick every check box.

You're all done, that's it! ✓ Once you restart ATS the controller will be available in the settings and the input wizard. Happy driving!