How to Identify Aftermarket Car Stereo Wire Colors The reason you usually don't actually need a wiring diagram to install a car stereo, even if it's a second-hand unit that didn't come with any paperwork, is that aftermarket car stereo wire colors are Car Stereo Wiring Harnesses & Interfaces Explained - What Click to view on Bing17:15What do the colors on your wiring harness mean? How do you connect your wiring harness or interface to your stereo? We'll show you! Full explanation on our b..Author: Quality Mobile VideoViews: 2 How To Install A Radio Without A Wiring Harness Adapter Click to view on Bing19:55Diy Bri gives you in-depth instructions and tips to successfully wire a radio into any vehicle without a wiring harness adapter. Learn the techniques and tools needed to complete your radio installation like a pro WITHOUT the Author: Do It Yourself BriViews: 1 Wiring Diagrams for Car Radio - Car Audio Help Wiring Diagrams for Car Radio . Car Stereo Wiring Diagrams One of the challenges DIY installers face is finding the correct installation diagrams for car stereos. Below I have put together some of the best free sources for car stereo wiring diagrams and wiring colors.