Crownie is right about checking for steering movement during start-up (selftest) also make sure you have a good woodruff key on that new steer motor that was just installed. Whats happening is the steer module wants to see movement of the steering within a window of time via the feedback encoder. If you suspect the the feedback encoder is not counting + and - you can swap it with the steertiller one on the platform as they are the same. Hope this helps? Let us know what you find.