[HETPE3B]

Ok, I did get Tech2 scanner. I'm trying to set up the system to connect to the cluster on my table (obviously without a car).
For some reason cannot fix the communication. Please correct me if I'm wrong:
The data should go through contact Nr2 in OBD connector to the contact Nr A6 in the cluster?

When in TIS I click to Service Programming System, then to Request Info, then I choose Chevy, 2004, Silverado, Diesel, then I click "continue", it is showing "reading VIN and ECU" and then "error, no communication with a vehicle". Then cluster resets by itself.
Ideas?
I'm powering the Tech 2 from the same power supply port that powers up the cluster to make sure they are on the same "+" and "-" circuit.
Actually should I or should I not use CANdi module with those trucks?