Peugeot 408 Central Locking Failure

I had a similar problem with my old Opel Astra. The door locks went crazy, starting with one door, then spreading. It turned out to be a defective cable or plug connection to the locking mechanism. Like a dodgy wire in a lamp – sometimes it works, sometimes it doesn't.

Interesting. Was it difficult to diagnose? Where was the defective connection in your Astra? Near the fuse box or in the door itself?

Diagnosis was tricky, like finding a needle in a haystack. The connection was inside the door itself. I just took it to a workshop. Much quicker, and they had the right tools to test everything properly.

Thanks for the advice! I think I'll do the same. Electrical gremlins are beyond me. Just got it back from the shop. You were spot on! Turned out to be a defective cable or plug connection. Cost me 95€, but at least it's fixed.