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 - Understanding Pioneer Wire Harness Color Codes Click to view on Bing6:05Learn about the Wire Harness Color Codes for Pioneer in dash receivers that do not have video screens. DEH, FH, and MVH models that do not have Video Screens..Author: pioneerelectronicsViews: 388K COMMONLY USED COLOUR CODES FOR BRITISH CAR WIRING PDF fileCOMMONLY USED COLOUR CODES FOR BRITISH CAR WIRING Colour Main/Tracer Use BROWN Main battery feed Brown/Blue Control box to ignition and lighting switch (feed) Brown/Red Compression ignition starting aid to switch. Main battery feed to double pole ignition switch.