Sounds similar to my issue, have you checked the connector I mentioned above? The connector was only partially seated when I originally found it, and would sometimes work, sometimes nothing. It's pretty easy to pop the plastic cover off the steering column if you can't see/feel it enough with the cover on; I think there are just 2 or three screws on the underside of the column and the whole thing will unclip to gain access to the harnesses.Mine stay in the parked position, never move.
Had the same experience again today. After driving for about 30 minutes, then sitting for an hour, they worked just fine.