i want to change this relay and would like a schematic (if pos) for the 4 relay power relay, pictured, just in case

 

Rex, do it one wire at a time, is what I did. Attached a diagram, second page. Also attached a manual with the same diagram but more detailed schematic. On the XJ6/XJ12 forum a member has just gone right through the DII system and got it working perfectly, so worth looking at that too.
https://www.jaguarforums.com/forum/x...ations-216854/

 

Thanks Greg, perfic 😊😎