Door lock wiring

Hi there
As per a few previous posts I've been having ongoing issues with my passenger side door lock /mechanism
It locked and door wouldn't open either from inside or out
I tried the main door control unit from the drivers side - no joy so
I smashed out the door lock mech with chisel to allow the door to be opened.
Tried a new lock mech.
I can now manually open and close the door but it won't lock Or unlock electrically.
So I assume the door lock mech isn't getting a signal.
I checked the a pillar junction and it looks clean and dry
Does anyone know how to test this - perhaps at the a pillar junction ?
Ie what connector and pin would I expect to see voltage down to trigger the door lock mech?
Pretty much tried everything else and really can't use that car much without a door I can lock so any help much appreciated

Thanks
 
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