For all electrical questions; Alternators including fitment; Light connections/wiring; Instruments; Gauges; MFA; Heater blower (not coolant related) issues etc etc.
Hints, tips and guides for repair and modification - the FAQ section on the main website is worth checking first for information relating to common faults and technical help. Useful posts and guides will be added to the FAQ http://www.sciroccoregister.co.uk/scirocco-faq
I have a mk2 loom in mine and (having just removed the front washer bottle) I'm pretty sure the earth cable goes all the way back to a horrible crimped multiconnector (it has about 8 earth cables in a massive single crimp) hidden in one of the big cable sleeves between the bulkhead and the battery. I'd try swapping in the rear motor first.