Keypad dorsnt work

[torres1903]

Hello everyone. Greetings. From one moment to the next the driver's side button panel plus the remote control plus all the windows plus the "foot" lights plus the open door alarm do not work.
I thought they were, or maybe they are, my cables were stripped a bit as I already understood for the rear door. Since I tried to remove the door and check the plug, I can't investigate further because the cables are embedded in the rubber without the possibility of inspection. I attach some photos to show you what I mean. I looked on the web but found the door pin different from mine.
I would like someone to explain to me how to check with a tester if everything is working properly; like how to set it etc etc  Know that you have to take me by the hand, step by step, because I only have the tester and nothing else.
Thanks to anyone who wants to help me and best wishes for a good end and start of the year...