Interesting. Unfortunately none of it makes sense yet (especially the fact that the button on the center console doesn't work). Looking at the wiring notes reminded me that I've had the siren disconnected for about a year. I wonder if it sensed that on power up (new battery) and disabled the locking. Tomorrow I'm going to try connecting the siren and disconnecting the battery again, shorting the terminals and hope that it resets itself. Will post an update then.

Thanks.