I think there is a small fuse that sits in the lighter socket itself. I believe you just twist the lighter socket and pull it out, then pop out the bad fuse in it and put in a new one. At least that's how they've been in my other vehicles.
Mine went out too, but I had to take it to the dealer the next day anyway so they replaced it.
Mine went out too, but I had to take it to the dealer the next day anyway so they replaced it.