Battery Drain

[H2Chuck]

I was curious if anyone else may have had this problem.
My 03 after say parking it on friday afternoon and not getting back in it untill early on Monday morning seems to have a drain on battery .I have to jump it off.I have did the usual (test light in series with battery cable and pull fuses 1 by 1 ) I have'nt pulled all fuses but I pulled the most common fuses acc. etc and with no luck .Maybe ecm? anyone had ideas without pulling every single fuse 1 by 1 ? I have back up sensors and camera ,I called myself checking those .Any ideas would be appreciated . Cranks good if i drive it everyday ,and i have not put a meter in series to see how much of a drain i have ,(figure it has to be a good one to pull the battery down in a cpl days .
Thanks