Car wiring diagrams: 3 5Mm Audio Jack Wiring Diagram, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. This tutorial will show you how to connect a . mm audio jack from an old pair of headphones to the audio input of your DIY audio projects.. A TRS connector tip, ring, sleeve also called an audio jack, phone jack, phone plug, jack plug, stereo plug, mini jack, mini stereo, or headphone jack, is a commonog audio connector. TRS connector typical pinout for audio plug. Stereo . mm jacks are used for Line in .When wiring a .mm stereo audio plug, you re always going to need a few key tools like .