The rear brake lines corroded & failed on my X type, so I replaced them both & while trying to bleed them ( 2 person method, 1 on the pedal & me at the nipple) , I can't get pressure at the calipers. Any ideas?

 

Just an update incase this happens to anyone else. I checked to get pressure at the ABS unit & managed to get pressure after a lot of bleeding at one of the feed lines(front left & rear right feed) but nothing to the other line, so checked the master cylinder & was only getting pressure through 1 port, so got a new master cylinder. I fitted this & had the same problem. I removed the master cylinder & checked the servo & found this had collapsed. So new servo needed. Apparently this is not uncommon on Ford Mondeos when the fluid is all lost due to leakage or master cylinder failure. Thanks for taking the time to look.