Technical Indicators not working

[Borkala]

I was driving the coupe yesterday and my indicators were working okay at first and then the indicators stopped working and simply made a buzzing noise. side lights and headlights on the same stalk work fine. I've checked the fuse for the indicators and it's fine (even swapped it around with another 7.5A and the same problem).

Any idea's what this might be?

Thanks

Adrian