I had the same thing happen on my 2013. I opened the slide, and found the wire had been pinched along one of the slide rails. They had the wiring tied to a folding plastic piece, that folds when the slide is retracted. The plastic had broken, allowing the wiring to fall into the slide rail, and pinch. I repaired the wire, rigged the plastic piece with some zip ties, and replaced the blown fuse for the lights. Works as advertised.