It's less vehicle specific and more tire size...sure the JK version might have a harness and correct plugs...like Boogieman said just find one that'll work with a 15" tire and wire away.
I ended up mounting a pod light on top of my swing out tire carrier with a cross bar holding GMRS and CB antennas. The pod does red/white and makes a great reverse light and third brake light.
I wanted quick access to the spare tire and didn't want to deal with disconnecting a light. Thoughts being...at least for me...that about the time you need a spare is when you're tired, wet and cold...and less shit in the way the better.
-Mac