The lock has been working intermittently for a while, and now the only way to lock is by using the physical key instead of a button.
Today I managed some time and decided to remove the door card. My first guess was that the wires in the rubber joint where door hinges were broken, so in order to check them I needed to remove the connectors. But I couldn't manage it. The space is to small. Then I tried accessing it from inside the car, at the driver footrest. But while removing plastic covers I only managed to break the plastic lever used to lift the hood.

And of course I cannot see the connectors from that end.
Any advice? Do I need to remove the entire door from the hinges in order to gain access?
What about trying to test the wiring at the lock itself? To see if the signal reaches the lock? Which pins would I need to connect my multi meter (connector has nine of them).
Sorry for my bad English. Any help would be appreciated.