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How to connect a wiring harness to your new car stereo

A look at Posi-Products Posi-Twist connectors

I've been with Crutchfield since 1999, where I began as one our advisors, helping our customers choose new gear. After a couple of years, I moved to the writing team where I spent a decade researching new products and getting hands on with car stereos, amplifiers, speakers, and subs. Yeah, I've been doing this for a while.

For the past few years, I've been the managing editor of Crutchfield's Car A/V web article content. I couldn't ask for a better job — we get to play with car audio gear every day! I'm a Virginia native from the heart of the Blue Ridge Mountains. Outside of work, I love listening to music, playing board games, and installing new audio systems for my friends.

More from Robert Ferency-Viars

Posi-Product Posi-Twist connectors make car stereo installation a whole lot easier than soldering. Plus, they're more secure than old-fashioned electrical tape or crimping. How easy is it? Take a look at this short demo video to find out.

Video Transcript

Secure connections are important when you're connecting your Crutchfield wiring harness to your new receiver's harness. And that's why we always recommend Posi-Products connectors. Here's how they work. Strip the ends of the wires you'll be connecting, twist the wires together, slide the Posi-Product connector over the wires, and twist on the top to finish a solid, secure connection without tape or soldering. So order a pack of Posi-Product connectors before you start your installation.

  • Walter Elliott from Lanexa

    Posted on 8/25/2015

    How well will they work in a marine application ( salt water environment )?

  • Alexander Hrabe from Crutchfield

    Posted on 8/25/2015

    Walter, as long as you use marine-grade wiring, they should work as advertised.

  • Edwin McGuire from Mc Dowell

    Posted on 9/11/2015

    Why not use regular color coded wire nuts (gray, blue, orange, etc..), then you don't even have to pre twist the wires ? Could save you maybe 1 or 2 steps.

  • Fred from Oklahoma City

    Posted on 2/28/2016

    These don't look any better than butt connections. Possibly less secure and a lot more expensive. Where's the advantage?

  • Alexander Hrabe from Crutchfield

    Posted on 2/29/2016

    Fred, this'll just come down to preference. Given the choice, I'd opt for Posi-Twist connectors every time. I've used them for several stereo installations and found them very secure and really easy to use.

  • James J McGrath from Allentown

    Posted on 4/3/2016

    I still prefer soldering with shrink insulators. Now THAT'S secure.

  • James Rutledge from Little River Academy

    Posted on 12/2/2016

    W when I cut the wires at the harness, what color goes where, I can't find the schematic, 05 GMC Yukon XL

  • Alexander Hrabe from Crutchfield

    Posted on 12/5/2016

    James, you won't need to cut the factory harness if you use an aftermarket harness to connect your new stereo. You can use our vehicle selector to find what you need, or just give us a call.

  • Doug from Orchard Park

    Posted on 2/20/2017

    I doubt these are approved by ABYC for Marine use... Have you submitted them?

  • Josh n Savannah Jackson from Bristol

    Posted on 8/31/2017

    Have a pioneer aftermarket sterio and have been trying to replace it with the factory installed one. Only issue is cannot get the write wiring adapter that will plug into my existing factory wiring plug and need something i can wire up to the factory adapter to pioneer directly or a wiring adapter that will plug in to cars adapter and from there wire the pioneer wiring to it and connect it in the back of the new am sterio. It is a 2001 Toyota celica gts.

  • Alexander Hrabe from Crutchfield

    Posted on 8/31/2017

    Josh, I've passed your question along to one of our Advisors who will contact you soon to help.

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