Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Nothing to do with me Ted, but a loom that age I would completely strip off outer binding to visually inspect all wires. Did that with the 550 and ended up replacing a couple of wires.
Ted,Go to this site and download the CB500-550-K-Shop-Manual. Has a couple of diagrams from page 146. Might be helpful.https://www.honda4fun.com/modelli/cb500