How do you change the wiper assembly on a 1998 Ford F-150?

Remove the grill around the wipers, make sure to get all the screws, some are hard to find, but when you get all the screws the grill lifts off and exposes the wiper assembly. Remove wiper arms, nuts are under a cap at the base of the wiper arm. Unplug the electric assembly. Remove all mounting bolts from the wiper assembly and it will lift out. This works for a 2000 f150 so it is probably the same for 1998.