Hi, my 2005 alarm keeps going off. The car still drives even with the alarm going off. The key operates the car but does not have central locking as it’s a dummy case. Siren disconnected to stop the noise but hazards still flash when I drive. The central locking does not work by the key but oneday the car locked which I noticed as the boot locked, this has never locked before as the key did not central lock so was always unlocked when I opened the door with the key this is when the alarm went off. Inside the car the tow light is flashing all the time. Anyone help?