When pressing remote rear hatch won't unlock but doors do. Is there a manual release and is there a solution to this?

Rear hatch is locked or unlocked with a key. (if equipped) • To open the rear hatch, insert the key into the lock, turn it to the unlock position and pull up the rear hatch by pressing the handle (DOOR). You can also lock/unlock the latch (but not release it) with the central door lock system. • If unlocked, the rear hatch can be opened by pressing the handle (DOOR) and pulling the hatch up. • To close the rear hatch, lower and push down the rear hatch firmly. Make sure that the rear hatch is securely latched.

Press door unlock switch in car or on remote to release the lower tailgate, even if the hatch is open.

Go inside the rear hatch area remove the trim panel and manually trip the hatch release.

Release and raise the rear hatch using either the unlock button on the inside of the driver's door or a keyless remote, locate the hatch release on the inside of the hatch, then depress the hatch pins using a flat-head screwdriver, and remove the hatch panel holding clips with the trim panel remover.

2

Remove the rear hatch release panel with your hands, detach the release cable C-clip with the flathead screwdriver, then carefully pull the hatch wiring out with your hands.

3

Remove the rear hatch release with the ratchet and socket.

i am in england,and our cars have a 2 position lock,turn left then release OR turn right and release,one of these will allow the rear door to be open when then the rest of the car is open.

First, on the rear hatch, there is an actuator. On FX, when you close the trunk, it kind of **** the hatch closed all the way. When you press lock on the remote, this same actuator locks it as well.
Now,
1) when you unlock the car from the inside, go back there and press the button to open the hatch door manually, do you here any noises?
2) Close all doors, go back close to the hatch button and using the remote , lock the car and then unlock the car. you should hear a sound from the actuator locking and unlocking the lock on the rear hatch!

If you don't hear this, your actuator is inop.
Next step would be to check the fuses inside the car, on the left bottom driver side, and outside on the battery compartment.
It might be just a fuse.
If all fuses check ok, your actuator is most likely gone! Not ea expensive fix, just time consuming!

NOW, if you can hear the noises, then something is either broken inside the actuator or one of the cables is loose!
Hope that helps.
Also, what year and miles on your fx?

The lock is stuck in the "locked" position.
When you close the hatch, it is jamming the latch hook into the wrong area.

Manually open the hatch. Unlock the hatch (even tho the hatch is already open). there are two bolts holding the metal "loop", the loop has moved. Adjust the metal loop and close the hatch / lock it, etc.

the unlock or popper for the door needs to be replaced. the door should work with a key.

No easy way to do this - you need to remove the inside door panel from inside the truck and manually release the lock. You didn't say where the wiring was burnt, but when the door is open test for power at the lock solenoid - if not there when unlock is pressed, inspect the wiring (particularly at the two rubber wire casings connecting the door to the frame). If it is there, the lock solenoid is stuck and may have to be replaced.

1) Unlock all doors from driver's door while it is open. The driver's door is the only door to remain open during this process! 2) Turn the key from OFF to RUN 8 times within 10 seconds, with the eighth turn ending in RUN. All the doors will lock and unlock if program is successful. 3) Turn key OFF and remove key from ignition. Within 20 seconds, press any button on the remote. (Press sliding door or rear hatch and it will open!) 4) If door locks do not respond, wait several seconds and press button again. If doors still fail to respond, try repeating steps (1-3).