My wife's Cherokee has a button on the dash marked A that shuts it off but she has to hit it every time she starts the car. One thing to know about the s/s is if it starts showing a notice on the instrument cluster that it can't work because the battery is charging it's time to replace the battery. Also your fuel milage will drop about a mile per gallon when the battery starts to go bad because the charging system works all full blast all the time. Her factory battery lasted a little over two years.