Need a wire harness for Boss 612UA. Went to a guy that installs stereos. He ordered the harness for the car, but says I need one for the stereo too. He couldn't order it and I can't find one specifically for that stereo. Where can I order one?reddit/r/CarAV · May 7, 2014This will fit your deck. i hate myself2 votescan you just call boss directly? or.. just re buy the head unit.. ??2 votesSee allSee all comments 612UA - Boss Audio Systems -You'll need a wire harness specific to your car model. This allows the power and speaker wires that come with the radio to connect with the speaker and power wires in your car. To do this, just match the colors of your radio wires to the colors of the wire harness wires.3.6/5(2) boss 612ua | eBay www›Search›boss 612ua77 product ratings - BOSS 612UA AUDIO Boss MP3 Receiver AM/FM USB/SD Front Aux input. $24. Buy It Now +$7 shipping. Boss Power & Speaker Wire Harness MCK762BRGB, 612UA. Brand New. $17. Guaranteed by Fri, Feb. 15. Buy It Now +$2 shipping. Aftermarket Boss Digital Media Receiver ID 612UA LKQ. Pre-Owned.