Have Volvo Questions? Ask a Volvo Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.
Are you able to get the rear seat back to lay down to gain access to the inside of the trunk?
You can request a call and pay the extra fee to do so, but I can not take it. I have no phone service where i am this week, just WIFI. We can though continue tomorrow.
Since you can get the trunk open if you have a volt meter we can diagnose what is wrong.
Do you have a test light and or know someone with either tool?
Yes I can guide you through this. A 29$ INNOVA brand digital multimeter from auto one will work perfect. Here is your diagram.
Trunk open, lock actuator accessed. There are 4 black wires pins 1-2-3-4 in a row.
Pin1 is power when commanding the trunk to open
Pin2 is always ground
Pin3 is the trunk ajar switch. It changes from grounded to not grounded based on being opened and closed.
Pin4 is illumination power.
We need to verify the ground is good and if the actuator gets power when commanded to unlock. If those are present then the actuator will be to blame.
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Sorry you felt my help had no value.
Sorry you could not do the repairs. Once you contact the website they can refund you so I am not paid on this post.