This instructable was inspired by https://www.instructables.com/id/Add-an-auxiliary-MP3Ipod-input-to-your-cars-st/?ALLSTEPS so thank you "aka_bigred" who was the original author. This mod will allow you to add an MP3 player input jack to your car stereo.

This is made for a Stereo with a CD player WITHOUT an AUX option.

Caution. I take no responsibility if this messes up your Cd player, your MP3 player or worse. This mod is not perfect but it works for my purposes. To you nay sayers keep it to yourself.

This mod requires you to take apart and reassemble your cars cd player if you don't feel comfortable doing it then don't

The items I used in the mod are:
Pioneer DEH-3400 (Make Year 2002)
30 Gig IPOD video
Old pair of headphones

Step 1: Stereo Removal

Remove the car stereo. I did not take pictures because everyone has a different stereo.

Step 2: Disassemble

Now that you have your stereo apart it might look something like this. On the left side is the main unit. The right side is the cd player itself and this is what we will focus on from now on.

Step 3: Find the "input"

Depending on the model of Stereo that you have you should have a "ribbon wire" that connects cd player to the main unit. Where the Ribbon connected to the cd player is where you want to look. The image attached is up close.

If you look closely you can see to the right of where the ribbon is attached it says on the board "ROUT" , "LOUT" and "AGND" These are the three connections that we need to make.

I can't say if it is like this for every cd player but it works for mine. This idea here is we are tricking the CD player into thinking that is it playing a CD.

Step 4: Solder Time

Now it is time to take that old pair of headphones and cut the speakers off. The headphones that I had was as described.

Left - Green wire and bare copper wire. Green is Pos.
Right- Red wire and bare copper wire. Red is Pos.

Solder both copper wires to AGND
Solder the Red to the ROUT and the Green to the LOUT

Step 5: TEST!

Before you go any further make sure it works!

Step 6: Seal It!

We don't need to start any fires or short out something so get some liquid electrical tape and put it on the soldered points.

Step 7: Reassemble

Reassemble the stereo. You might want to tie the wire into a know somewhere on the unit. That way when someone decides to pull on your nice new "Aux" cable it doesn't get ripped out!

Step 8: Silent CD

Now this is definitely NOT my idea or my file. Like I said before this was "inspired by" with out this idea it wouldn't work so thank you.

Burn a CD with the silent track and just fill the cd with the track. This way the Cd player "plays" a silent cd and we HEAR the mp3 player bi-passing the CD unit.