I thought the battery in fob key for my corsa was the problem, I changed this and tried re setting it by putting key in ignition etc, still no joy.If I put the key in lock and turn it will open driver door only, if I put key in lock, turn and press the fob all doors open, Is this a problem with the fob or the central locking module in the door?. The fuse has been checked, but is there another fuse for the central locking system, please help.

pete G, August 2013