How do you replace serpentine belt on a 1995 ford e150 4.9 with ac?

To replace the serpentine belt on a 1995 Ford E150 4.9 with AC, first, locate the belt tensioner and use a wrench to relieve tension on the belt. Remove the old belt by noting the routing path or referring to the belt diagram. Install the new belt according to the routing path, ensuring it sits properly on all pulleys. Finally, release the tensioner to secure the belt in place and double-check for proper alignment.