Thanks Bill

Yes, I have several wiring diagrams which almost seem to vary by year although with regard to the central locking they are all essentially the same schematically. The diagrams aren't the problem. And I'm an expert googler (!) and have found multiple images of fuse/relay box locations which broadly align with my car but seem to err when it comes to the actual location of the tailgate relay in question. The problem I have is the actual physical locations which seem to vary by year and maybe even manufacturing location (?). I have found several references to the tailgate lock relay being in the rear drivers side fuse box area. The only challenge is that they are not there in my car. In fact I can't find any of the door lock relays. I think mine is a late year 2006 V70 so maybe they change the layout by then?

I may just pull our VIDA to see if that helps with schematics, locations and maybe even allow me to test lock activation and relays without actually knowing where they are physically!