The cig has a wire harness, so you can't wire it up wrong unless you take them off.
I've been having problems with my cig lighter. I was fixing my e-brake and had my center counsel off. Once I got done I had to plug in a few switches and then when I went to start my car, poof, blew the fuse. Angery story short, I went through a box, 2.50, of fuses after I unplugged everything.
The strange part...The first fuse I pulled from my car was in the spare fuse spot. The cig lighter had no fuse. I thought, Hmm, thats strange. So the next fuse I tried in there, nothing, then I put it in the proper spot and it blew. So...WHAT THE HECK is wrong with it? I had everything pulled from the cig lighter, yet its still blowing.