There's a forum for Ford Taurus owners... I know this, because I used to own an old 94, and would go there for diagrams and such. Due to the website's policies, we're not supposed to post URLs in the answer text, but if you get on Google and do a search for "Taurus Club", the first result should be what you're looking for.
You will find that info in the owners manual that should be located in the glove box.
You can view the 2005 Ford Taurus Owner Guide ( which includes the fuse box diagram ) online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides
You can view the 2009 Ford Taurus Owner Guide ( which includes the fuse box diagram ) online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides
Try Autozone.com - they have a comprehensive on-line repair guide for the 1996-1999 Taurus/Sable.
autozone.com has online manuals that give you all that info
find out what engine is in it, and look online for a diagram, honestly thats the safest way to go.
The Owner Guide ( which includes the fuse box diagram ) can be viewed online www . motorcraft service . com ( no spaces ) Click on Owner Guides
You can view the 2004 Ford Taurus owners manual ( which includes the fuse box diagram ) online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides
You can view the 2006 Ford Taurus owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( the fuse section starts on page 156 )
You can view the Owner Guide ( which includes the fuse box diagram ) online at ( www . motorcraft service . com ) no spaces : Click on Owner Guides
You can view the 2003 Ford Taurus owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( the fuses and relays section starts on page 130 , it has the diagrams and lists )
if you go to a part store to get the O2 sensor you could actually ask them to give you a diagram or directions how to change them KKODAL
ER Diagram of online shopping