Cannot bleed passenger front brake calliper, URGENT help needed.

Hi everyone,
Sorry to seem a bit dramatic in my title but I'm currently on the drive with a laptop and a 1995 P38a Range Rover Diesel that I cannot bleed the passenger brake caliper on.
I have just changed the NSF brake caliper as the old one appeared to have siezed (loads of brake dust on the drivers front wheel but nothing on the passenger front and it pulled horribly to the right when braking.
Got the Rave CD out for bleeding the brakes and thought I'd go through the correct process from scratch with it.
Bled the master nipple no worries, then bled the drivers calliper which had a little air in it but when bleeding it I only get about 5mm of pedal travel.
Came to do the passenger front caliper and nothing, we cannot get any fluid out of it. I thought I'd try bleeding the front booster nipple and then go back to the passenger front caliper but when following the rave instructions we get nothing out of the front booster either.
The brakes have always been a bit rubbish on it with very little travel and the ABS light is on so I know there was a problem.
does anyone have any suggestions ASAP as the car is currently immobile on the in-laws drive. Do people think it may be the booster pump and accumulator or do people think it may be the ABS Booster unit (the big block with the reservoir attached)?
Any help will be greatly received!
Andy.

Think if you put it on diagnostics you will find it is a modulator valve fault. It may not have been the caliper.

Unfortunately, I have no diagnostics. Is it usual to end up with no pedal travel and braking on only one caliper with that fault then?

B16FUN said:

Unfortunately, I have no diagnostics. Is it usual to end up with no pedal travel and braking on only one caliper with that fault then?

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There are solenoid valves within the unit that modulate ABS. Switch the fluid supply on and off to the wheels as required. If the relevant one is stuck shut you won't get any fluid coming through.

You have done the correct procedure with foot first , then using pump is there any clicking comming from pump indicating air?

U need to operate the abs solenoid to that wheel via diagnostic to get the fluid moving through very arely do u need to tho so maybe the solenoid is jammed

Well, a bit of an update. I have replaced the ABS pump and the Moduator block and blead the whole system as per the Rave CD and the braking is now perfect.
Cheers,
Andy.