Keep in mind that an electrical diagram or schematic diagram shows what devices are connected to what other devices. But they do not show the order of wiring or the routing. They may show wire color. Better than nothing of course.
A wiring diagram is a manufacturing drawing showing the specific order in which multiple devices are wired together, with wire colors, wire gages, and in a perfect world the actual wire routing, and in a fantasy world wire numbers matching numbered sleeves on the wires. Those last two things are not going to happen on an RV. And probably none of the other.