Peugeot 807 Central Locking Failure

Greetings. I understand you are experiencing difficulties with your vehicle's central locking system. I once encountered a similar predicament with my Opel Zafira. Might it be prudent to verify the integrity of the relevant fuses?

Fuses are fine. Same symptoms though? Complete failure?

Affirmative. The symptoms were analogous. Although in my considered opinion it could have been diagnosed and possibly resolved independently, I would strongly recommend seeking assistance from certified, professional mechanics.

Right you are. 95€ later and it was indeed a corroded connector. Cheers!