If your Viper car alarm has gone off, there are a few things you can do to reset it. If the alarm is set to sound when the car is started or when the key is inserted, you can try turning it off and on again. If the alarm is set to sound when the car is in park or when you open the door, you can try turning it off and on again. If all of these methods don’t work, then you may need to replace your Viper car alarm.