Interesting! Now I am trying to figure out how I can leverage this new found info... do you know where he tapped for power?

It would be cool if you had demon eye LEDs in your headlights that stayed on for 45 minutes after you shut down.

If you look at the IPDM schematic, it was tapped right above the DRL relay (normally the DRL's are fed below the DRL relay.

So they were being powered at the same moment as the IPDM was.