What fuse box number is for Jaguar 2001 XJ8 seat warmers? The Fuse for Licence Plate Lights on a Jaguar XJ8  is Located in the Fuse Box in the boot/Trunk on the right hand side it is Fuse No.-19 and is a 5AMP one. SOLVED: Where is the fuse box in a 2001 jaguar XJ8 - Fixya Nov 16, 2011The fuse must be in the main fuse box. The position and function of the fuses is normally marked on the inside of the fuse box cover and also in the owner's handbook. If you don't come right with these, work your way through the fuses looking for a blown one.