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Re: Scenic II (04 Plate) Tailgate Lock not releasing
Sounds like the motor solenoid ain't working - it should click back and forth. It may be worth removing it and giving it a good soak in WD40 or such as it possible it may have suffered water ingress and seized. If you have access to a multi-meter it may also be worth checking the electrical connection to the solenoid is getting voltage.
Obviously you'll need to remove the door liner for access.
Currently in madnoel10's garage:
Honda Civic 1.4l