When the brakes went dead, was the fluid reservoir actually empty? If not, my guess is that air is getting in through the right rear wheel cylinder. It's possible for a seal to hold under compression when you're applying the brakes but leak and suck air in when you release them. Once you get enough air into the system, everything stops working.
For a test, try driving a short distance and using the brakes a few times, then bleed the right rear again. If you get air *immediately*, it's probably leaking in from the cylinder. If you get clean fluid at first, *then* air, the air must be getting in somewhere farther up the system (bad flex hose, maybe?).
Monday, March 1st, 2010 AT 2:04 AM