Ok, further to this: http://www.thedieselpageforums.com/t...ad.php?t=45533

Symptoms:
* Battery is dead or near dead after a few days.
* Passenger side door ajar messages comes on.
* Occasionally the alarm goes off.

But only when:
* It's excessively cold wet or snowy.

This happened last winter too, but I had so many other problems (The entire front end + head gaskets) that I kinda ignored it and just got in the habit of d/c the battery negative terminals.

I had assumed it was possibly a bad door actuator, but if it only happens in crappy weather I'm now assuming it's an electrical fault. I think it's the passenger side rear door.

Any thoughts on how to go about tracking this down? I assume the battery going dead is likely the BCM triggering / not being able to stay shut down. At this point the batteries have gone dead enough times I'm pretty sure their hosed but I don't want to put more money into batteries until I've fixed the root cause. This time around I put a charger on them for a couple of days and then d/c the ground.

Thanks!