I looked at the pics. The second one shows a disconnected wire. Did the person reconnect power to that wire at a different location?
Also, I need to better understand something. First, am I correct in understanding that you are unable to change the airflow direction? I ask because that system (mode door actuator) is controlled by engine vacuum. So, the person may have broken the vacuum supply to the control unit in the vehicle.
Also, when you say the A/C doesn't work at all, by chance, are you hearing the A/C compressor actuate? Again, the air temp door (blend air door) that controls the temp of air entering the vehicle is actuated by engine vacuum, so it could be the same issue. If there is no engine vacuum making it to the right places, that will prevent things from operating properly. In addition, the defrost position is a default area in the event this happens.
I attached a couple of pics below showing the vacuum schematics. If you remove the control unit, locate the black hose and check to see if there is engine vacuum to it when the engine is running.
Also, let me know if the AC fuses you checked have power to them. Here is a link you may find helpful:
Let me know.
Images (Click to make bigger)
Sunday, August 29th, 2021 AT 7:01 PM