The fun part has come. Wiring harness comes off tonight and gets cleaned.
A few tips follow.
1. Wiring harness has memory. use it to your advantage when re wiring stuff. I like to use a big sheet of cardboard to transport to the tub and lay on once clean (after blowing out with air) to dry. Keeping things in there general position makes things easier on reassembly.
2. Zip tie leaf stacks together.
3. take LOTS of photos, but also just spend the extra 30 min to label all the wires on controlled lamps. Trust me that it is really nice to do the work up front rather than not be sure what color a wire is in a photo.