What, besides a blown fuse, would cause my cigarette lighter not to work?

What is your question?

My cigarette lighter is not working. I brought it to my local shop and they said its not the fuse. They suggested it could be a short. What else could cause this to happen? How much is the avg cost of short? I only need my lighter to work for my cell charger and navigation system. Are there other options to charge besides the lighter?