What is the science fiction show with "mood" necklaces?

This was something that I saw when I was a little kid. This was a live action show and I only every saw one episode. This could have been an episode of The Outer Limits or Twilight Zone. The things that I distinctly remember are that they were in a desert type wasteland, and when there convoys went out they were attacked by savage like humans. They also had "mood" necklaces that looked like a crystal that glowed a certain color and it meant a certain thing. It was a lot like they were in some type of military. I really hope someone can help me with this, I'd like to know what it was.