It could be both. Its not a contest to see who can come up with the best answer. There can be many possible causes for one set of symptoms. Its our job to list as many as we know and think to be likely, your job to go out and try them all
Looking at post number 3 Lando is probably on to something. I would do that first, its only ~30 bucks for the non-cruise cable, not sure how much it is when you have cruise. Also, With cruise it could be one of the two cables used, or the junction box, so if you ever thought of getting rid of the cruise control now is the time.
