It sounds like a fuse is out in which case you should replace the lock motor. Here are some guides on where the fuses are and how to change the lock motor out.
How to check the fuse.
Once the plastic trim is off, you can open the trunk by pulling on the release rod that is attached to the lock.
With the trunk lid open, you can more easily work on testing & removing the release motor.
Please let us know what happens so it will help others.
Images (Click to enlarge)
Tuesday, August 22nd, 2017 AT 9:39 PM