Jaguar XK8 electrical faults

I own a 1998 Jaguar XK8, with loads of electrical faults. The traction control warning light is on, there's a gearbox fault, causing limp home mode, headlamp failure down one side and the windows don't work properly. My local garage just wants to replace control boxes to fix problems, very costly. It seems impossible to find a local to Basingstoke proper auto electrician who is willing to fault find and diagnose problems and can test boxes rather than replace until faults are fixed. Hoping you might have some advice.
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Answered by Honest John on

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