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.