Re: Non-JBL wiring diagram and/or adapter?
Oh man. What a nightmare. If you lived closer, I would wire everything up for you, and wouldn't need any harness. Good luck and let us know how it goes.
2004 Toyota Tundra SR5 2WD 4.7LV8. Exterior mods: Bilstein 5100s all around, Wheelers Progressive AALs, Magnaflow 12256 muffler, 18" American Outlaw Apache wheels on 265/60 Michelins.
"He who asks a question may be a fool for five minutes, but he who does not remains a fool forever."