Peugeot 308 t9. The error is trailed. Take the car for repair!

The connection to the trailer is faulty: take the car for repair. This is exactly the message I saw one rainy morning. But there is a solution to this problem besides disassembling the outlet itself.

[@ivarsivanovs1182]

Can you, please, tell me where to get this instruction book of "How to install tow bar?" I have the tow bar installed, its only the wiring that`s left! Thanks

[@peugeoton4033]

I had a tow bar installed when I bought the car. The instruction came along with other documents with the car. I would not like to give false hopes, but I think I will scan it and put it in the public domain (for free). The only thing is that I don't know exactly when (I don't have much time)