are we talking xj, as in jaguar xj? i hope not because i wouldn’t wish a jag on my worst enemy. you have ecu’s for ecu’s. control modules for tail lights, and flat out shit electrical. couple that w/ shitty hydralic system-- you are screwed.
i dont mind an abundance of relays-- as i understand older cars pre-can systems needed to be able to switch stuff on and off. 928 porsche is the king of this. yet the brits couldnt wire a carb’d 4 banger mg or triumph right–dont think they will fare any better w/ a jag. lucas ftl.
only thing jag was ever good for was ifs/irs for street rods.