I had a towbar with single electrics fitted and the first time I unlocked the car the alarm went off but only the siren, no flashing indicators and you can still start the engine and drive the car. I called the towbar fitter back and even after he disconnected the new wiring the alarm still went off. Just to get me home he disconnected the siren, but it still carried on going off until it's integral battery went flat. \if anybody can help with advice please do, any replies welcome

Thanks Joe