How do deadlocks work?

[FlashBastd]

I know that when I lock my car, I leave the key in the horizontal position to remove it, and this means that a) the central locking can't be unlocked from any other door, and b) the doors cannot be unlocked from inside.

My question though, is that while on the door that I phyically lock, this may be a manual effort, on the other three doors this is electronic, so why can't it be triggered by a remote locking system?

[Brianmoooore]

why can't it be triggered by a remote locking system?

No great problem to work the deadlock motors from a remote, given an alarm with suitable outputs, but the deadlocks on the boot and driver's door are mechanically operated only, so, on a 2 door, only the passenger door would be deadlocked.

[FlashBastd]

Well on my Touring, the drivers door is deadlocked electronically if I lock it from the passenger door, so surely that would solve that problem?

What output should the alarm have to facilitate this?

[Brianmoooore]

Well on my Touring, the drivers door is deadlocked electronically if I lock it from the passenger door, so surely that would solve that problem?

What output should the alarm have to facilitate this?

How can you deadlock it from the passenger door? It doesn't have a deadlock position.

Alarm would need to be two channel, with the deadlock output connected to a latching relay to connect the red/brown deadlock wire to earth and keep it earthed for deadlocks on.

[FlashBastd]

You are right. I was so certain that it did I just went out to try, and of course it doesn't. Good point!

The upshot then is that you can deadlock all doors except the drivers door.

What outputs does an alarm need to take advantage of this feature?

[Brianmoooore]

.

Alarm would need to be two channel, with the deadlock output connected to a latching relay to connect the red/brown deadlock wire to earth and keep it earthed for deadlocks on.

[FlashBastd]

Ok, me stupid.

Thanks.