Looking for some advice. I have a Case 930CK (401 diesel)and once in a while when I shut down the throttle I forget to shut off the key and the batteries go dead. As you know, non-deep cycle batteries dont like going dead, so I"m trying to figure out a way to put a buzzer on the tractor that would come on when the key is in the run position but only when the tractor is not running. In other words I dont want it going off the whole time the tractor is running. The ignition switch is just a typical 4 position switch (accessory, off, run, start)I hope this makes sense. Any ideas would be great! Thanks