Brake help

I am not getting any fluid to the rear brakes. When I loosen the lines at the abs modulator the 2 front seep fluid, the 2 rear do not, is the modulator shot or just the solenoids on top? 1994 olds cutlass supreme s 3.1, We just replace the entire back brake calipers and lines up to the the first unions we came to by the gas tank. And when we tried to bleed them nothing.