WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power Liftgate/Retractable Running Boards Wiring Diagram (1 Of 8)
Courtesy of FORD MOTOR COMPANY
Fig 2: Power Liftgate/Retractable Running Boards Wiring Diagram (2 Of 8)
Courtesy of FORD MOTOR COMPANY
Fig 3: Power Liftgate/Retractable Running Boards Wiring Diagram (3 Of 8)
Courtesy of FORD MOTOR COMPANY
Fig 4: Power Liftgate/Retractable Running Boards Wiring Diagram (4 Of 8)
Courtesy of FORD MOTOR COMPANY
Fig 5: Power Liftgate/Retractable Running Boards Wiring Diagram (5 Of 8)
Courtesy of FORD MOTOR COMPANY
Fig 6: Power Liftgate/Retractable Running Boards Wiring Diagram (6 Of 8)
Courtesy of FORD MOTOR COMPANY
Fig 7: Power Liftgate/Retractable Running Boards Wiring Diagram (7 Of 8)
Courtesy of FORD MOTOR COMPANY
Fig 8: Power Liftgate/Retractable Running Boards Wiring Diagram (8 Of 8)