2001 ford expedition broken wipers?

You need to remove the wiper arms first. thay must be in the highest position for removal. take your hand and move them to that point then remove the nut cover at the base of the arm and remove the nut, a wiper arm remover tool may be required if thay dont come off easy,this tool is available at your local auto parts store.then remove the panels that sorround the wiper arm studs from which you took the wiper arms from,these panels may have little plastic screw covers on them that need to be removed to reveal the screws that hold the panels down