Thanks for the offer and input 180, however my Crossfire is the US model.

I haven't had chance to get to the siren yet (I believe you have to remove the wipers, then the screws to remove the plastic panel?).

I check the other things I could think of, but I really need to check the siren.

When I lock the car and open the door, I can here a relay clicking, and the lights (front and rear) flash, but no sound. I am guessing that the logical option is the siren, but if you have any better ideas to check first I am all ears.

Thanks again.