Chevrolet Zafira

Hello, if someone can help me with the electrical diagram of the Zafira electro -hydraulic direction because from one moment to another it became hard, I need to check whether or not the electric motor of the pump works but for that I want to know which cable enters voltage and in which signal, if someone could help me with that I would be very grateful, there the connector has two thick cables one is mass I do not know how they work, beforehand I have very grateful bay .....