How to Install Auxiliary Input in Car?

Step-by-step installation of an auxiliary input in a car's audio system, featuring a person connecting aux cable in a car dashboard, highlighting DIY audio customization.

There’s a lot to be admired about cars in the 80s and 90s. One thing that’s difficult to admire is the technology of audio companies during the period. Amid a battle for supremacy between CDs and cassette tapes, manufacturers tried to satisfy consumer needs with unique headphone models.

Today, both CDs and tapes have been replaced by the old-fashioned, but new options for music have superior audio quality and flexibility.

These preferences for collectors and fans have evolved over the last few years. Today, vehicles manufactured in the 1980s and 1990s are beginning to rise in value. Buyers who were young or financially disadvantaged to purchase what they wanted when the automobiles were brand new in showrooms are finding excellent condition vehicles for sale at affordable prices.

Aux input is an ideal upgrade for your car stereo. It lets users play music on their mobile phone or MP3 player while in the car and lets you tune into satellite radio or even speak on your phone without hand.

Setting up an au-in port can be an easy task that a home-based do-it-yourself mechanic can do with professional-looking results in minutes. Various methods exist to add this feature to your car, truck, boat, or other vehicle. Motorcycles can also be outfitted with playability via aux-in.

Step-by-Step Guide

Installing an aux input can be challenging; however, this step-by-step guide to set up an aux input on a car stereo’s blog will make it easier!

Find a port that is open on the dashboard of your car

Switch off the power and take all cables off the dashboard ports.

Take off the cover of the desired port using a screwdriver

Connect the wire harness adapter (provided by the manufacturer of the aux) to the back of your car stereo unit.

Connect one end to the input jack on the back of the unit.

The majority of listeners enjoy listening to their favorite songs while driving but are afraid of running out of battery every time they want to listen to them.

Adding an aux input to your car stereo is an opportunity to hear the car’s speakers without using the power of your phone.

What is an Aux Input?

The aux-in, also known as an auxiliary input, is an accessory that lets you connect your music player to your vehicle’s audio system using a 3.5mm headphone connection. The connection bypasses the stereo receiver’s built-in amplifier and speakers, resulting from its amplifier and speaker system.

This way, you can play music on your phone or MP3 player using headphones in your vehicle rather than plug directly into the device’s sound output.

Aux Input for Car Stereo Installation

There are two options available to connect aux inputs to car stereos. The first is directly connected to the rear of an accessory stereo. Another way to connect one is through your wiring harness. This is a way to use an amplifier system that can boost the strength of the signal from an aux signal.

Install the entire Aux.

Aux input kit is a cost-effective option to have an input for your vehicle. Most installers charge around $50 for this kind of service if you don’t wish to do it yourself. But making the installation yourself takes 30 minutes!

You’ll have to purchase an audio in-line kit to connect your car. These are available at any store that sells audio accessories. The typical kit includes:

  • Car stereo adapter (X)
  • RCA cable (X)
  • 3.5mm male audio jack (X)
  • 3.5mm female audio jack (X)
  • The wire clips (+/- 20 pieces or more)

Below are step by step guide:

Remove the stereo head.

If you’ve altered or changed the stereo, you should already know how to do this. In this way, you’re ahead of the game.

If there’s no problem, you’ll look at the stereo factory installed in your car. I need to find out the procedure for removing the head because all brands and models differ and have many variations.

However, generally speaking, you’ll be able to remove the face plate and remove the screws that hold the stereo in the first place. The first thing you need to try is to Google “remove your car’s stereo” along with the model, make the model, and year of your vehicle. There are step-by-step directions or videos to help finish this task.

Locate the RCA inputs

If they are present, RCA inputs will be on the side of the unit’s head. They’ll be marked R and L, with white and red (or black) on their sides if you don’t find these ports and can’t use the technique. Therefore, you should go straight for “The Somewhat Less Easy Way.”

If you already have RCA inputs, then you’re lucky. In this scenario, you only need to connect a Y-adapter to connect the AUX port to RCA.

Connect an RCA to an AUX cable

What you require is the RCA adapter cable. Ensure it has female RCA pins on one side and only a 3.5mm Aux connector on the opposite side.

Keep it short or ensure sufficient length to reach behind the backseat DJs. The flexible gold-plated PVC-coated cable from UGreen is available in lengths of 3, 6, 10, and 15 feet. However, six feet might be enough.

After plugging both male RCA pins into the stereo’s RCA inputs, try plugging the AUX connector into your smartphone or other music player. It is possible that you need to alter the inputs on your stereo to make the audio work.

How to Solder The Aux Input

You’ll need some basic skills in soldering for this project. If you’re uncomfortable trying to do this yourself, bring it to an expert and see whether they’re interested in taking on the seemingly simple task. The result will be worth the expense of ensuring that no one else steals your music!

If you connect an aux cable straight into your vehicle, you’ll require soldering. It is also necessary to have essential tools, like iron for soldering, a solder, wire stripper wire clips, and solder.

First, set the input to your stereo by dissociating them from their bracket. After you remove one screw from the back, pull gently the two pieces of plastic and secure them in place.

If you’re using the RCA cable, remove approximately two inches of insulation at the end, which will connect to the aux jack. Cut off approximately one centimeter of insulation from the part where you’ll connect your stereo adapter. After the exposed wire, you can apply a tiny amount of solder on each wire.

If everything is working well

Here’s a hint: use tape to secure the RCA cables to the RCA using a small amount of electrical tape. If you take them off accidentally, you’ll need to remove them from the stereo to correct the issue.

Once you’ve finished, it’s time to shut down. Where do you connect the cable? Most stereos have enough space to carry the cable beyond the head of the stereo. Make a small cut at the face plate’s edge (making a U-shaped groove) to pull the cable neatly.