I upgraded from a Thrustmaster T500 RS to a Moza R12 base with a RSV2 wheel but went with a set of Simsonn Pro Plus pedals that plug in through USB so they are not recognized in Snowrunner only.  Using joytokey I tried mapping the W key to the gas and S to the brake, tail lights come on but the vehicle does not brake and when hitting the gas pedal the engine revs up but the vehicle does not move.  I tried using X360CE software to emulate an Xbox controller and it removed FFB made the game glitchy, it was unusable.  I would prefer to use my pedals for throttle and brake.
My Moza wheel messes up the mouse in the map but it is still usable and I can select waypoints.  My biggest issue is not being able to use my mouse to select winch points.  I used to use almost all of the winch points on vehicles and aiming the quick winch does not attach to the winch point I am aiming at.  

I am going to leave this up in case someone else comes across this issue.  It turned out I had an extra USB peripheral plugged in that was apparently conflicting with my pedals.  I was able to use joytokey to map the W, S, Handbrake to my pedals and they are not just making noise, they now work.  I discovered through YouTube that you can cycle through winch points using an Xbox controller, I needed more control over the winch than quick winch so very glad that works, it's glitchy but it works.

I do have a workaround similar to yours. Basically, I turn the wheel a bit and try to use the mouse..

I will try that, thanks.

I tried this, thanks for sharing.