I have a 2011 jeep grand Cherokee limited. The rear hatch door does not unlock with the power locks. I have to manually unlock it with a screwdriver. Once its unlocked I can open and close the rear hatch door normally until I lock the doors again. I have replaced the locking mechanism.
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Hi @ace5029
Don't know Jeeps but since you've replaced the lock mechanism, check the wiring/connections between the liftgate control module (located in left D pillar) and the door latch mechanism.
Looking at the wiring diagram (see below), in the liftgate door latch box (upper right side in diagram) there's a lgate cnch rel latch (cnch) connection on pin 4 and a lgate cnch rel ulatch (rel) connection on pin 1.
Presumably latch = lock and ulatch = unlock
Since the lock function works check the tan/white wire from the door latch pin 1 to the liftgate control module pin 21 is OK.
If the wire is OK check if there's a signal voltage on the wire when the door is being unlocked.
If there isn't it may be a problem in the liftgate control module. I assume that the CAN bus connection between the control module and the body control module is OK as you can lock the liftgate
(click on image)
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