It wasn't an actual equation per se, rather an attempt to numerically represent my opinion of modern GM electrical systems. Gm uses a databus electrical system that runs variable voltage through the same wire to control multiple functions. It's extremely difficult to integrate anything into, a PITA to work on, and if something were to go wrong with one compenent, it can potentially effect many other things. For expedition vehicles, there is some logic to keeping things simple and I admit the WJ is far less "simple" than an FJ60 or 62. Probably similar to the more modern 80's and 100's though.
Oh man, I must look at too many equations every day. Oddly it didn't even occur to me that it wasn't an actual equation. duh. Like mesha+250 13 year olds + equations=brain malfunction. Variable voltage does seem like a complicated way to do things.