Turns out it was a bad relay. You can tell which relay it is by having someone step on the brake while you are at the REM and you can find the relay by listening for the click or feeling the click. This particular relay is blue and only cost $8.50 for the part. I was shocked, I didn't know Volvo had...

Thanks for the reply. I had already checked the fuse and it's good. I also replaced both lamps, checked the ground on both sides and verified continuity between the plug and the bulb fixture. I called a friend at my local Volvo dealer and he said it may be a software issue.

The main brake lights on my 2003 v70 are not working, just the light in the center. I am getting a message "check stop lamp". Both bulbs are good, This started intermittantly, now is on everytime I stop. All my other lights are ok.