I've been fixing my rear fog lights after an mot fail and trying to find out about the wiring from the Haynes schematic. Even after blowing this up to A3 it still looks like a plate of spaghetti thrown at a wall. I went looking for better and found the following page;
http://www.volvowiringdiagrams.com/?...ing%20Diagrams
No doubt at least some of you guys know about these, but I found them really handy and a damn sight better than Haynes.
FYI, if you have a DL don't go looking for the rear fog relay 'cos there isn't one.
