In article , Davey writes
Exactly what I surmised, but as I said, the main earth strap from the
>starter IE engine block, to the chassis is present, and soundly connected
>both ends. I can't see how it can't be conducting electricity.
Have seen this a few times on 300 tdi Disco's
Replace the earth strap.
Not worth messing about cleaning up the old one.
Good luck