I have a 99 cobra convertible and the theft light is staying on. I think it is draining my battery but it could be because the battery is almost 4 years old also. What would cause it to come on and stay on? I had it over at my Grandpas over the winter for about 5 months without a battery charger on it. I have one on there now and am going to leave it on there for about 24 hours. It does start and drive. Any help would be greatly appreciated. It does have a key fob with it.