berlingo brakes

[Rancher]

I am looking for some help to sort the brakes on my 05 van enterpise model.
We put the 2 front wheels up on blocks and then bled the system out but the brakes are not as good as they were before we changed the brake pipe on the back left slave cylinder. Any help or advise appricated.

[addo]

Keep bleeding. Put all four corners up, wire the proportioning valve to "fully loaded" position and go round and round.

[Rancher]

Keep bleeding. Put all four corners up, wire the proportioning valve to "fully loaded" position and go round and round.

I have been led to believe that with the ABS system that the wheels had to be on the ground with the front wheels on blocks to help the fluid to pass over the baffle in the fluid chamber
Where is the valve located at ? Not sure what to do now.

[dooglebus]

Very handy info. Just changed axle and having trouble bleeding brakes. Got an axle for 40 pound from scrapyard from a 53 reg . Just installed in my 99 berlingo and had many broken pipes , bolts and hub problems . The axle I got for 40 was a lot of hassle as it did NT have abs. 2 brake sensors to buy and a lot of swearing later and I think I 've got it cracked. Many thanks addo.