Finished the job up today.
Soldered on fresh automotive wiring. The original loom had what I suspect was 20/22 gauge down to 14 gauge or something. I only had 16 and 18 gauge replacement
Hour later: heatshrink applied, pins crimped on, and color coded tabs on the end of the new black wire.
Unfortunately my cellphone (since upgrayeding of course) has a bug where some images aren’t saved…
Also, this is some bullshit, Honda. Two yellow+red wires?! and again for blue+black!! It defeats the purpose of color coding in the first place! Come on..
Well, for the first time since I owned this car, all of the speakers work! Hooray!