Volvo Troubleshooting Questions? Ask a Mechanic for Answers ASAP
Welcome I'm Chris aka Moose
See if fuse C1 10 amp is good. See if the fuse powers up when commanding the trunk to open with the switch. If it does not power this fuse and see if the trunk lid unlocks. If it does not then gain access to the trunk latch from the back seat down so you can try powering the blue/brown wire and grounding the black. If that too fails then you need to break the latch apart to get the trunk open to address the faulty latch motor.
-----------About me and Just Answer------------
I am in my upper 30's, have a wife and 2 sons. I farm, fish, hunt, build, and coach youth soccer. I work on anything with an engine, been to many schools and classes through my 12 years with the dealership to get trained and certified. I try the best I can to share what I know and or have access to with my customers. Please consider I base my questions and answers to you, solely on the information you give me since I am not there to see, smell, hear, touch, or test. I try my best to be here everyday starting at 3pm central. Rating an answer is required. Please let me know if your not pleased prior to rating or if you cannot rate me so I can try to help a different way. God Bless and have a great day.
Glad you got it resolved, was it the fuse I mentioned?
Thanks for letting me know what you found to be the problem.