Wiper

Hello everyone, I present myself as the new member of the forum.
I have a fiat uno 97, I have searched manuals and other data related to the windshield wiper (front) without finding almost anything.
It happens that suddenly he stopped working and I have no idea how to check it, I have disassembled it, tested the motor and is fine. If I connect it only in a position starts but when I armed it to place it it does not work anymore. I cleaned the contacts that "La Cajata Negra" has but since I don't know what I have, I don't know if the problem is there.
Does anyone know how to repair it is the funeral?