This may help you - not too sure about ballast resistors as my car has nothing as sophisticated!

http://books.google.co.uk/books?id=9kQ941Dh0dcC&pg=PA95&lpg=PA95&dq=viva+ballast+resistor&source=bl&ots=fE9o7XahI4&sig=CFWsoYuOGpp_em7bjE42sf6TJL8&hl=en&ei=Ew9PTbKAB9SAhQeU0uSNDw&sa=X&oi=book_result&ct=result&resnum=6&ved=0CFMQ6AEwBQ#v=onepage&q=viva%20ballast%20resistor&f=false

link doesn't work too well, you may need to copy and paste it

Edited by Vitesse6 on 06/02/2011 at 21:18

Moved to Technical, where you should get some more advice.