Hi folks, you might find this link to a whole host of Jaguar electrical diagrams to be a useful source for electrical information. (came accross it with m0t0rm0uth last Autumn)
The site seems to include most Jaguar models by Model/Year. There is undoubtedly some repetition, but there are just too many files for me to download and cross reference them all.
The files are in pdf. format and as is stated, some of them are quite large.
The site: captainjaguarscathouse.com
The Link: Captain Jaguars Electrical Diagrams
Hope you find it useful, if you have not already come across it. There are also other interesting sections in the Resources page.
All the best