there is a diagram sticker in the glove box for the fuses under the searing wheel
You can find a front door latch assembly diagram, for your 1996, Mercury Cougar from the manufacturer website. Many auto-parts websites will have the diagram.
find a chilton manual, they are cheap
You can get a vacuum diagram for a 1994 Mercury Cougar 4.6 liter in the Chilton's manual for that year and model. You can also find the diagram online at All Data DIY and at Engine Guy online.
http://www.cougarpartscatalog.com/1919mecovaac.html
call the dealership they can print one out for you!
the owners manual
The Haynes Repair Manuals would have a diagram of the serpentine belt on a 94 Mercury Cougar XR7. You can find the manual at your local library, book store, or most auto parts stores.
You can find this information from John Sherbit-MOTOR MANUAL/MOTORALLDATA Distributor
1999 mercury tracer fuse panel diagram
On the drivers side up under the dash you will see the fuse panel close to the drivers door
You can find this at you local public library...........
Look in the owners manual.