I also decided to clean up some wiring this winter. I originally ran all the wires from dash to the under seat location, then out to the respected locations. Any troubleshooting can then be done without going under the dash. I pulled it all out, built a new breaker box, rewired it all then found most of the turn signals not working. It took about a week of chasing wires to get it back to where I started. I drew up new wire diagrams so it won't happen again!
Good luck on your search,
joe