When changing the brake fluid using the Actron bleeder kit on my 1986 240 DL all went well until the back left tire. When I opened the bleed nut nothing came out. I took the valve all the way out and still nothing. I then bleed the rest of the system using the 20 psi pressure from the bleeder kit. When I was done, I removed the bleeder kit, opened the rear left tire bleeder valve, and stepped on the brake peddle. After some pressure the peddle gave and fluid began running from the back left tire valve. I thought all was well, however when I buttoned everything up and ran the car, the Brake Failure light came on. I am unsure if I need to bleed again in the proper order, back left, left front (front), left front rear and so on. Or is the pressure distribution valve broken. Please help.

thanks