137699, many thanks for your post. Yes you're right
I took the car to a garage today and bad news were confirmed. I was told that the alarm siren is faulty and got two options either to disconnect the module and wipers would work, but then i don't see a point to have an alarm on the car, if it's not working fully. Or the more expensive option is to have it replaced and the quote was £250 incl.VAT, so I guess the price is right.
Could you please send me a link to the TSB article you mentioned...