Ed Haywood
Final Approach
Thinking about having an avionics shop open the panel and rip out all the mystery wiring and clean things up. Although I can’t figure out why that should change anything except soothe my OCD.
You can make some good progress on that yourself. Get under there with a DMM and start tracing and labeling wires. If you find an orphan circuit that goes from/to nowhere, remove it. Once you get the dead wires out, start looking at the condition of the components that remain. If you have a sketchy wire or terminal, you can replace that too. Do some bundling where it is logical. As long as you are careful and methodical, you won't harm anything, and you will learn a lot about your aircraft. Find an A&P willing to supervise so you can ask questions when unsure. Buy wire and terminals from Spruce and get a ratcheting crimper from Amazon.