Help. calibrate 05 Buick LeSabre Gauges with Tech2 GM MDI

[borshch]

have 2005 Buick LeSabre Instrument Cluster out of the car.


trying to re-calibrate the gauges.


connected 12V to ignition and battery B5, B6, and Ground to B4, B7 at the light blue connector.
GM MDI pin 2 to Cluster B1, B2 also at the light blue connector.


Tech2 keeps giving "No Communication with vehicle" error

[borshch]

Also even if I check gauges by sweeping them I won't be able to know their stopping / zero position since the owner probably moved them when he tried check out the cluster. Because their counterclowise stopping point was about 1inch (or like 3cm) below "0" .