I have a discovery TD5 2002. Whilst replacing the rear brake pads I could not push the Caliper piston back far enough to get the new pads in so I released the bleed nipple which allowed me to push the piston back fully. Now I have no brakes on the primary diagonal. I have removed both diagonal bleed nipples to look for pressure but when the pedal is pressed no fluid (or air comes out). The other diagonal is working fine. I suspect the ABS unit has been confused and is not letting that diagonal brake but how do I unconfuse it. Any body any ideas. 
