I just did a review of my 411 install because I was missing a constant power wire, or so I think. I emailed Lextech to get clarification on that one as his document doesn't instruct you to add a 2nd constant power wire when 411 swapping a 97, but 98-00 actually have this wire in the harness and use it with the 411. At any rate, here's what I observed with the DMM:
Battery: 12.21V
C1-20: 12.21V (constant)
C1-19: 11.48V (switched)
C1:75: 11.68V (switched)
So at this point I need to figure out how this truck is wired so I can narrow down where the voltage drop is. My gut says go right to the ignition switch, we'll see. At the end of the day I'm looking for a component that gets 12.21V in and spits out considerably less. Good call on logging voltage statesman! I'll have to add that to my list of stuff to watch.