I tried locating the problem by taking out fuses one by one, but didnīt really find it. So I eventually brought the car to an car electrician. He located the problem as related to the bluetooth, which I never use. In november there was some welding done. During welding they put clamps on the battery but it didnīt protect the bluetooth apparently. He said that the old Nokia bluetooth system is vulnerable and connected partly outside the fuses and therefore cannot be located as the source by taking out fuses.
So I hope he is right,
Thanks for the help and tips
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