Do you have the smoker's kit? That's the one with the extra charger/lighter and the ashtray receptacle in the console. If that's what stopped working, I'd take the console apart (it's pretty easy) and make sure you don't have a broken wire or a connector that's pulled out.
If it's the 12v power outlet in the front and also the one in the rear, I believe there is a common relay that both of those go through. It's the same relay that you have to put a jumper in to do the 12v constant-on modification, which you should be able to do with a quick search on the forum.