The usual thinking is to hook up an amp meter in series with your batteries neg. cable and the batteries neg. post.
Lots of speculation as to what the current draw should be. Add-on gadgetry can raise that value. Many will chime in with what the numbers should be, but in your case, you won't see anything near the numbers that you would expect in a normal situation.
The trick on a vehicle as new as your will be connecting the meter without waking up the system. Doing that will add a large draw. Steve Brotherton posted a few yrs. back on how to do this.
Did this also occur before you worked on the door? If it occurred after, something in the door circuitry is eating juice inspite of a fuse being removed.
This may help:
http://asashop.org/autoinc/may/Techtips.HTM
and
http://www.mightyautoparts.com/pdf/articles/tt63.pdf
Just my 2 cents.