Automatic trunk lock not working

It could be all the above, but do this. First find the fue box and get out the owners manual. If you don't have a manual, than get a haynes book from Napa, or Autozone. . ect, and locate the fuse. If it's not blown, than try locating a relay, probably in the same relative area as the fuse. check it by swapping out with a matching relay next to it. Look at the #'s to confirm they're printed on top. If thats ok, than you need to look at the trunk end. Locate the wires that go to the release mechanism, the outlet that the trunk plugs down into. It may require you to remove the inner panel from inside the hatchback. Check to see if you have power to the solenoid. You will need a test light or meter for this, call a friend if you don't know what these are, Test to see if the switch is sending power to the trunk. If it is, than the solenoid is out or frozen. Work you way from the front to the rear, that way your not playing hit or miss with the diagnosis. good luck Ill try to help you futher if you need it.