About a week ago the wiring loom on my 4000 decided it was going into full meltdown mode 
(Was the original loom supplied by "The Prince of Darkness? 
)Got a new Bareco wiring loom and voltage regulator, but the colours on the new loom are different to what "remains" of the old loom.Cheers TSG. 
Just what I have been looking for. 
Many thanks, TSG.