Wabco air pump Citroen / Fiat repair and test

[mexanico1971]

Hi
I got here im my garage 2 of these pump"s from Citro C4
does any one knows how to test and buy the electro-valves ??
Find this video explain how the system work

https://www.youtube.com/watch?v=9s7uytTtenk&t=55s

Best regards

[mexanico1971]

Here the pics
were to buy electro-valve ?
Because I think one is damage

Thank"s in advance

Brs