It sounds like the latch has failed and you need to replace it, to manually open the window you will need to go inside the car and remove the inner panel. Then locate the latch and find where to pop it open, once that is done you can unbolt the latch and get a new one from Ford. To be sure follow the testing description bellow.
Start by making sure everything is operating correctly, follow the following procedures and then bring me word.
DIAGNOSIS AND TESTING > Locks, Latches and Entry Systems > Principles of Operation > Unlocking the Doors and Liftgate with the Remote Keyless Entry (RKE) Keypad System
To unlock the driver door, enter either the factory set code or a personal code; each digit must be pressed within 5 seconds of the prior digit. The interior lamps illuminate.
To unlock all doors, enter either the factory set code or a personal code (driver door unlocks) and press the 3/4 control within 5 seconds.
To open the liftgate window glass, enter the factory set code or a personal code (driver door unlocks) and press the 5/6 control within 5 seconds.
After you have followed the following steps find below the closest problem that you are having in this symptom charts, and bring me word.
GO to PINPOINT TEST A.
The door locks operate only one way
GO to PINPOINT TEST A.
The doors do not lock/unlock using the remote keyless entry (RKE) keypad
GO to PINPOINT TEST B.
The doors do not lock/unlock using the remote keyless entry (RKE) transmitter
GO to PINPOINT TEST C.
The autolock does not operate correctly
GO to PINPOINT TEST D.
Panic feature is inoperative/does not operate correctly
GO to PINPOINT TEST E.
The remote keyless entry (RKE) keypad illumination is inoperative
GO to PINPOINT TEST F.
The remote keyless entry (RKE) transmitter is out of synchronization
GO to PINPOINT TEST G.
The smart lock does not operate correctly
GO to PINPOINT TEST H.
The liftgate window glass is inoperative
GO to PINPOINT TEST I.
The liftgate window glass does not release using the remote keyless entry (RKE) transmitter
GO to PINPOINT TEST J.
The remote keyless entry (RKE) transmitter has poor range performance
GO to PINPOINT TEST K.
The memory seats do not operate correctly using the remote keyless entry transmitter (RKE) transmitter.
VERIFY that the memory is activated and if activated, refer to SEATING -- EXPLORER for diagnosis of the memory seats. If not, activate the RKE memory function refer to REMOTE MEMORY ACTIVATION.
The auto unlock does not operate correctly
Please let us know happens.
Best, Ken
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Monday, February 27th, 2017 AT 4:49 PM