WARNING: This page is about a different car, the 2014 Ford Police Interceptor Utility and 2014 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Grounds System - Wiring Diagram - G301 (1 Of 2)
Courtesy of FORD MOTOR CO.
Fig 2: Grounds System - Wiring Diagram - G301 (2 Of 2)