Why does my horn sound when I unlock my 993?

[belfry]

It is only occasionally when using the remote key fob.

[mollytherocker]

Mmmm, I think mine used to do this and I believe it may be due to a low battery. Does it happen when its been stood for a week or more?

Contact these guys who made the original alarm/immob, they can still supply parts and service!

http://www.hamilton-palmer.co.uk/

[stuttgartmetal]

Your alarms not arming.
Id check the radio earth first.

[FrankCayman]

That would happen with my 987 Boxster if the glovebox or centre console lid wasn't shut correctly.....don't know about the 993?