405 glx td 1995 saloon

[bernie]

I've just aquired the above.
In the r/h side of the engine bay is a lock for a key which I have.
What does it do?[?][?]
And which way does what?
Ta

[philhoward]

If it's the same as Citroens of the same era, then it'll be to turn the alarm off when they play up...

[bernie]

Thanks Phil.[:)]
Is it just alarm? immobliser perhaps?
So turn clockwise, is that on or off?[?][?]