Thanks for looking into the issue and keeping us updated. I personally am going to try to set up a relay to trigger the 12V to be a switched power input. It should be fairly simple to relay off of the 12v switched fuses that are right by the driver kick panel.
According to this image: (
https://i.stack.imgur.com/b3kaj.png) It looks like pin 16 is the battery power. I'll see how it goes when I work on the car later tonight.