I think this movie is out of the 80's. It stars a male that rides around in a car through desert looking landscapes, the car has a diamond where the stereo should be and it allows a woman to talk to him. He stays in hotels bye himself and has dreams about the woman. When he dreams about the woman she is wearing the diamond in her bellybutton. I believe that the woman had died and somehow she put herself into the diamond, so that she could be with the man. I have no idea what the plot is though. Thanks in advance.

This is just a guess since I can't remember too much about this movie, and it's from the 90's, but it has the cystal and woman in it, not sure about the dreams;

Knight Rider 2010 - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Knight_rider_2010)
Knight Rider 2010 (1994) (TV) - IMDb user comments (http://www.imdb.com/title/tt0110273/usercomments)

From the clips I watched it may be the right movie, but I'm not sure yet, thanks so much.