Jim (Papajam) is the Librarian for AROC-USA. All AROC members are entitled to free copies of manuals and other technical information. This information is technically for AROC members only but Jim often supplies it regardless out of the love of the the cars. Jim is an absolute gem to this community and receives zero monetary compensation for his efforts. If you are not a member, please join AROC-USA and support your fellow Alfisti.BB member Papajam makes color coded wire diagrams for many model Alfas. I'm not sure if he has one for the Series 4 Spiders. Send him a PM and ask. Include your email address. If he has them he'll send them as .pdf files.