1995 Pontiac Grand Am bleeding

i replaced two wheel cylinders on the rear along with 2 axle lines and tried to bleed the brake system with dot 3 fluid. i get fluid with no air at the calipers in front but nothing in the rear. i also have a stiff hard pedal when the engine is off and running. i bled the intergrated abs pump at the master and got fluid out of the 2 front ports but the rear ports are dry. this is leading me to think that the abs pump has a seaized rear valve. i a stuck at this repair untill i install a new valve to abs / master combo.