NS Front Brake Not Working - ABS Issue?

[steverrquattro]

Haven’t used the car for three weeks and the NS calliper is back to not working and no fluid coming out as before. Are there any filters in the ABS unit that can be cleaned out?

Also when I first started the car this time and pressed the brake pedal with force, the brake warning signal appeared on the dashboard. Could this have any relevance on the fault?

[Tractor Dave]

There used to be a place you could send the pump to for repair. I've never looked inside one. Which car is this for? I have a spare aby pump here.
The warning is likely the bomb not holding pressure.

[Tractor Dave]

These guys used to have a good reputation. I've never tried them though.
https://www.ecutesting.com/categorie...iAAEgLTDfD_BwE

[steverrquattro]

There used to be a place you could send the pump to for repair. I've never looked inside one. Which car is this for? I have a spare aby pump here.
The warning is likely the bomb not holding pressure.

It’s for the ABY. Do you know if the brake accumulators are still available? Also is it a similar test to what you do on a UR?

[Tractor Dave]

It’s for the ABY. Do you know if the brake accumulators are still available? Also is it a similar test to what you do on a UR?

Yes, you can still get new ones. Also possible to re gas old ones if the membrane is good. It's a specialist job mind as you need to drill a hole and fit a valve.
I think the test is the same.
However, brake bomb will have nothing to do with no fluid at one caliper.