electrical - Radio Wiring diagrams and/or color codes A Universal Radio Connector Wiring Kit, and. A newer Nissan Radio Connector Wiring schematic. If it helps, my newer Nissan Radio comes out of a 2003 XTerra (non-Bose speaker version). EDIT: It looks like the wiring connector in my truck now uses browns and greens mostly for colors. The original owner did not keep his stereo after he removed it 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 Parrot Universal Radio Mute Wiring Diagram Parrot UNIKA is a universal interface that allows you to control the Parrot wire is for ground ; the yellow wire corresponds to the Parrot mute output. stereo's. It is important to follow the wiring diagram for your vehicle. In case of problem or if.