Another top issue

[kaeteck]

Hello,

I have yet another problem with my convertible top.

When I press and hold the open button, roof starts to open but suddenly starts going back and forth (jerking). Then no matter if I press close or open it randomly opens or closes(sometimes opens when pressing close, sometimes closes when pressing open) or is jerking. When I help the roof by hand, it goes a bit further down or up.

I suspect it's the relay or maybe the switch?

any ideas?