2002 Trailblazer. Window, locks, mirror on passenger door

I have a 2002 Trailblazer. Last week I noticed the passenger side front door's window was not working. I then noticed the power lock on the same door was not working and the same with the power mirror on the same door. I have not torn into it yet, as I was looking for any ideas that would speed up the diagnosis. I have to assume that since everything else is working properly, that there is some wiring harness connection problem in that door. Any other ideas?

All of those systems go through the passenger door module.......you would need a schematic to check this out.....