How do you tighten belts on a 2000 Ford Taurus?
By replacing the belt tensioner, this is a serpentine belt systems there is no adjusting the alternator bolt tighten the drive belts, if the belts are loose you must replace the belt tensioner and the belt to retain optimum performance from you Charging sytem as well as you other equipment being driven by the belt system.
Where can you find the belt diagram for a 2000 Ford Taurus?
Answer There may be a sticker under the hood somewhere that shows the routing of the belts. I can't swear about a 2000 Ford Taurus, but other Fords have this sticker. It might be over the radiator, or on the fender wells, or on the hood itself. They used to be silver with black printing. Look around. Good luck.