Airstream
Draft Schematics for Plumbing and Wiring

Details
I learned a lot about the value of basic schematics for wiring when building my first motorcycle. It doesn't need to be complicated or clever, it just needs to give you a reference point as you design the system and to look back on when you need to maintain or troubleshoot it.
I've done schematics for the wiring and the plumbing systems. You can see them here.

