A couple of other thoughts ...
A friendly garage with chaps who know about cars... and mending them.
Rather than just follow flowcharts in manuals and lost if it involves anything more.
Brands garage, High Rd, Trimley St Mary. Worth popping along to see them.
I'd say mention i sent you but they might shoot me next time i see them :)
Oh and a clever auto electrics guy - name escapes me... Gavin possibly ?
Marine + Auto electrics. Looks like they're on Elton Park Ind Est now, Hadleigh Rd.