1999-2003 Ford Windstar
To remove the serpentine belt on the Windstar use a 15mm wrench and rotate the tensioner pulley clockwise. Slip the belt off of the pulley and slowly release the tension on the pulley. Remove the old belt from all other pulleys.
Before installing the new belt check all of the pulleys and make sure they are not damaged and are free of any debris.
Route the belt around all of the pulleys according to the diagram leaving the tensioner pulley for last. Keep tension on the belt with your hand and rotate the tensioner pulley clockwise again to release tension on the pulley. Slip the belt over the tensioner pulley and slowly release tension.
Inspect the belt again and make sure it is routed properly and on each pulley correctly before starting your vehicle.