N/S/R central locking intermittently won't unlock either from the key or the switch on the drivers door. Works fine using the interior door handle.
So today I removed the door card to have a look. Nothing obviously wrong. There are five wires going to the lock. I'm guessing earth, lock & unlock. But what are the other two? The lock (or a switch within it) operates the interior lights, door open warning indication and of course, the alarm. Would one wire/switch control all these functions? I imagine the operation of central locking is pretty much universal across manufacturers, but I've never had any need to investigate how.
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