for the Wiki;

http://www.the12volt.com is a good site.  (used by alarm installers)

They have some really creative relay solutions like here
http://www.the12volt.com/relays/page5.asp

For Vanagon they have these reference pages:
http://www.the12volt.com/installbay/alarmdetail/2218.html
http://www.the12volt.com/installbay/stereodetail/2218.html
http://www.the12volt.com/installbay/cruisedetail/2218.html

>- if anyone has other good
>books about 12-volt wiring practices they are encouraged to go to the wiki
>and add those titles to the Books about 12 Volt Wiring page.