WARNING: This page is about a different car, the 2018 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
LH side shown, RH side similar.
Remove windshield wiper pivot arm nut cover.
Courtesy of FORD MOTOR COMPANY
Remove windshield wiper pivot arm nut.
Courtesy of FORD MOTOR COMPANY
Using two leg puller remove windshield wiper pivot arm. Use the General Equipment: Two Leg Puller