Brake fluid wont go into reservoir

[brodfather11]

As long as the rear brakes are adjusted up properly the only other cause is the hydraulic system.

I had trouble bleeding an earlier model , it had no ABS but had a load limiting valve which had to be held open. I tried a pressure bleeder, I'm not saying you cant bleed them without but it certainly helped and made  it a lot easier.

I think pressure bleeders should be used with ABS systems and I also think Haynes says so.  Possible to avoid damaging the master cylinder seals and/or  seals in the modulator  ?. Haynes is maybe erring on the side of caution.