The key fob was showing signs of trouble. I sometimes had to press the lock button several times to lock the car.
Then, one day, the alarm went off while in my drive. I was at work but my wife said that she tried to disable it with the unlock button. It wouldn't disarm. She couldn't open the door either so she unlocked the door with the key.
The central locking does still work.
We had to disconnect the battery to stop the siren. when I do this, a clicking is heard few seconds.
When I reconnect the battery, the alarm sounds straightaway. If I close the doors and the bonnet the alarm stops but is still set. The little red lights on the dash and under the handbrake still flash.
When I follow the scenario given to you with my attachment, the alarm stops sounding and I can drive the car. The red lights are solid and as soon as I open the door the alarm sounds when I switch off the engine.
One thing I haven't tried yet is to recharge the main car battery. I'll do that tomorrow when I have time.
I changed the battery on the spare key hoping that it was a battery problem. Both key fobs show a light when either button is pressed.
I have had the RAC out to the car and he has done step one right beside the siren. No result.