It is a 20 amp fuse. If you are standing on the passenger side looking acroos the engine it is the third one on the left side of the fuses. I took some pics of the top of the fuse box and then the inside to show you just in case.
This is the photo of the diagram on the outside of the fuse box that shows you where the fuse is.
This is a photo of inside the fuse box that shows which fuse is the rear defrost fuse
