wiring diagrams climate control maserati quattroporte 2005

[Giual]

Hi, I have a 2005 Maserati QP 5 with various electronic problems, the biggest of which is the air conditioning system on the TGK valves that control hot water to the stove radiator. I tried changing the TGK valves but without success. I noticed that the right valve opens and closes. while the left does not move. I changed the ecu but same problem, now I would like to check the electrical system but I need an electrical diagram to do so, does anyone know where to find it? Or can I buy it? Thanks