I think volvo must have used some cheap labour when the light bulb sockets were made...

Anyways, I had the same problem with the front left turn signal of my 2000 v70. To remove the bulb you need to craw under the car and reach from the ground up (in front of the left front wheel)from behind the front fender. You can actually see the light socket when you look from behind the front fender with your head on the floor looking up. In my case I just held the socket with my hand and turned left to loosen the socket. I never took my car to the dealer for the recall, instead I cleaned the dirty bulb contacts (due to electrical arching) and pushed the contacts in towards the bulb so that I could get a good contact between the socket contacts and the bulb contacts. And so far all is well.

Norbert