The numbering on your pdfs is a bit different from that on mine, but just as ugly. The actual wiring diagrams on mine are in the largest of the 6 files in the Wiring Diagram Section. That file begins with the power distribution and then goes through the various components in alphabetical order.
But if you can hear the motor, then it doesn't seem like you have an electrical problem. Everything tight?
2003 XS Premium MT >200k miles! ● 2005 Impreza 2.5 RS MT ● Robin-Subaru Powered Generator