Here's a couple of threads to read:
https://classicgoldwings.com/forum/view ... 01#p177401
https://www.classicgoldwings.com/forum/ ... 100+wiring
https://www.classicgoldwings.com/forum/ ... 000+wiring
Working on wiring generally takes longer than expected. Recommend using OEM style connectors wherever possible, makes life a lot easier, are inexpensive, and Princess auto sells a good kit by Pro Point to install these.
Remove any aftermarket wiring and accessories to start. Return the wiring back to the way it came out of the factory. Honda and other manufacturers used the minimum size and amount of wiring to have the electrical system safely operate the bike as it came from the factory. Any additions generally add to the current going through wires that were not designed for extra capacity - not to say anything will happen, but when you connect into the OEM system, you have additional considerations when troubleshooting electrical and other system problems.
You shouldn't have to replace any wiring. Take the connectors apart and clean, dirty connectors are a pain and can cause problems.
For aftermarket electrical items recommend installing an accessory fuse block that is a combination power/ground unit operated off a relay that shuts the power off when the bike is not being used.
Good luck.