Why doesn't my ford focus make a noise anymore when opening door if i left my lights on?

When i left my car lights on and opened the door it would sound to let me know. This doesn't happen anymore. Is it just a blown fuse or something else.
I have a ford focus econetic 2008

Could be the fuse - could be the sensor which sets it off - could be the actual beeper which can no longer make a noise.

See if it works when you open the other door or just your door does the interior lights come on when you open the doors if it does its most likely a beeper

Have you spoken to a service manager at your local Ford Dealer? He'll be in the best position to discuss your vehicle concerns. Our certified technicians will be glad to take a look at your Focus.

In the meantime, locate a dealer near you and set up an appointment with the link below:

http://owner.ford.com/...ateADealer

Enjoy the rest of your day!

Go into your menu and reset your warning chimes. If you've disconnected the battery at some stage, the computer may need to be reset.