Need Help because Haynes won't

[Weldingbiker]

I purchased a former ambulance that has been converted into a camper. The base is a 1996 ford transit chassis cab with a 2.5 turbo.

Problem 1. Brake Master cylinder with ABS pipes on the resovoir ATE code 10.6123-0150.3, TRW PMK924.
Is there any alternatives that i can replace this with because I cannot disassemble the current unit as it apeares sealed and I cannot find a replacement unit without donating some body parts.

Problem 2. The check engine light has come on the van is in a form of limp mode and i can't read the codes because my OBD2 reader is not compatible. It has had a complete set of stanadyne pencil injectors, timing belt, service, ect. To no avail.

What can I read the codes with?

May thanks in advance.

[V184]

whats wrong with the master cylinder ?

wheres the obd plug ?

[Weldingbiker]

IMG_20250530_125158.jpg

It' really difficult to source a replacement master cylinder in the uk without having to donate a few body parts like kidneys, an arm, ect.

The port is in the fusebox and 3 of the obd2 scanners refuse to connect I have been informed of the Lazer 2000 scanner but its easier to find chickens teeth.

IMG_20250529_164049.jpg

Thank you for your consideration.

[V184]

whats wrong with the master cylinder, long brake travel ?

Asked about location as on early models you could get codes with a split pin across the connector

[Weldingbiker]

Thanks for taking the time to help. I am sorry in advance but for clarity the explananation is a little long, and my speeling is not good....
The handbreak started acting strange by locking in different positions and then locked up totally. when I took the drums off the break material fell out of the drums, not the shoes just the sheets of breaking material in complete sheets
So I fitted new shoes, new wheel cylinders, bled the entire circuits ( 2 litres of DOT 4) just to ensure a fresh start for the rear brakes. (The front had been done a couple of monthes prior.)
when I come to use the breaks the pedal hits floor, pump pedal and it becomes stiffer (not solid) then sinks to the floor and there is very little resistance and no stopping power on the hydraulic circuit, just the handbreak.
No visable leaks no servo hissing same result with or without engine running so I assume that the servo is not the fault its the master cylinder (M.C.) I am sumising that the M.C. could not handle the extremes and popped the internals.
Drained the M.C. removed the M.C. cleaned it all externally and tried to bench strip.
Haynes says that this cylinder is not serviceable but I remove the spring clip and removed the plastic disk behind the clip and i am then faced with a blank plate with the pushrod going through the middle. nothing I tried would make it come out thus I was unable to determine the internal fault.
So I put it all together and have been trying for a couple of weeks to find one under £200 I was a welder fabricator by proffesion but it took too much of a toll on my body so I am registered disabled and dont have the money and that is why I cant afford garages or hundreds to throw at this.

When you said about clipping the two terminals on the obd port which pins do i short to enable the codes to flash out?

IMG_20250529_164049.jpg

[V184]

When you said about clipping the two terminals on the obd port which pins do i short to enable the codes to flash out?

thats for the early model which yours may have been being an ambulance but is not.

[MinorMatt]

I purchased a former ambulance that has been converted into a camper. The base is a 1996 ford transit chassis cab with a 2.5 turbo.

Problem 1. Brake Master cylinder with ABS pipes on the resovoir ATE code 10.6123-0150.3, TRW PMK924.
Is there any alternatives that i can replace this with because I cannot disassemble the current unit as it apeares sealed and I cannot find a replacement unit without donating some body parts.

Problem 2. The check engine light has come on the van is in a form of limp mode and i can't read the codes because my OBD2 reader is not compatible. It has had a complete set of stanadyne pencil injectors, timing belt, service, ect. To no avail.

What can I read the codes with?

May thanks in advance.

No there is no alternative, (The part number is superseded though to 10.6123-0153.3 from memory - do a search I wrote about it on a post here). Best bet is to take it off and send it to Past Parts in Bury st Edmunds who will sleeve it with stainless and rebuild it for an almost sensible amount of cash - I'm guessing it will be around £150ish. £200 for a new one? Good luck - I ended up paying over £300 for a new one about 8 years ago before all the tariffs and inflation. Cheapest I could find the other week was motamobil and I think it was £490ish? (and the only place that actually had one in stock)

For diagnostics you need to find someone with a Lucas Laser 2000, or Ford FDS2000. You can come and see me

[MinorMatt]

whats wrong with the master cylinder, long brake travel ?

Asked about location as on early models you could get codes with a split pin across the connector

Its not that early! Only mk4s can do that

[MinorMatt]

viewtopic.php?f=4&t=182512&p=1558923&hilit=10.6123+0150.3#p1558923

Sorry its 10.6123-0154.3

[Weldingbiker]

Update I finally got action from Pastparts about the brake master cylinder and that has been sent off to them so they can have a go at refurbishing it.
As for the EML and limp mode ..

For diagnostics you need to find someone with a Lucas Laser 2000, or Ford FDS2000. You can come and see me

I am in a catch 22 situation, The MOT expired on the 28th April and the tax expired on the 31st May, So I need to find and fix the fault to pass the MOT to get Tax to drive to a place to find and fix the fault but I can't move the van because.....

So the Quest for the holy diagnostic continues.

[MinorMatt]

In that situation.... a location might help us to assist