Adding a direct line-in to your car stereo for an iPod/mp3 player

 by pickingrin
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This instructable will show you how to add an auxiliary input, like a headphone jack, to your car so you can listen to an iPod/mp3 player/GPS or anything that has a line-out through your cars stereo.

While I will be adding it on my '99 Chevy Suburban, it can very easily be done on almost all cars, SUVs, and trucks.
Many of you will notice that I have a cassette player as well as a working radio in the car so an FM transmitter or cassette tape with a headphone jack might be the more logical answer. I have actually tried both, and while they both work OK the inconsistency and lower quality of the FM transmitter and the reliability and constant cleaning required of cassette player if you listen to your ipod more than a few times a month just don't cut it when you can have a high quality maintenance free direct line-in for a little bit more.
I found the auxiliary input I wanted at
Peripheral Electronics
then bought it off ebay.

The basic tools required are:
regular crescent wrench
Flat head screwdriver
Drill and bits (I used a 1/4" and a 5/8" bit)

You'll also need a stereo mini (1/8") jack-to-RCA cord about 3 to 6ft long (depending on whether the folks in the back seat want to play with the iPod/mp3 player while your listening). This cord will be what connects to your music player.
 
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Step 1: Preparing the car

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You will most likely have to remove the front cover of your dashboard to reach the back of the radio so its a good idea to remove one of you battery cables first so you don't accidentally set off the air bags or anything. There's very little chance of that happening, but if it did you would have much bigger problems than trying to connect your ipod to your car.

If you have two batteries like me (it's a diesel :-)) you should disconnect both of them. Later on I also had to move my shift lever since it's attached to the steering column so I set the emergency brake too.
meghu21 says: Jun 11, 2013. 1:32 AM
MP3 is an audio file which is compressed with this standard. Intrinsically speaking, an MP3 player is any electronic device which can play these audio files. MP3 player is referred to any device which can play music files in different formats.http://www.whatisall.com/technology/what-is-an-mp3-player.html
ewilder2 says: Dec 3, 2012. 4:02 PM
Excellent pictures and very clear instructions! Thank you! Can you tell me exactly which auxiliary input box you purchased? I want to ensure I get the right one. Again, GREAT instructable!
aphesia says: Aug 19, 2012. 2:18 PM
Great Instructable! This has made me decide to remove the old radio out of my '81 Chevy LUV. But I want to run an ACC line to a box such as the one you used and just get rid of any normal stereo nonsense. Is there an auxilary input box that you could suggest to use (since there's never going to be anything that was made for vehicles in 81)? Thanks!
galadriel says: May 4, 2012. 12:33 PM
Oh, fantastic, I was thinking about doing this to my '99 Chevy Tahoe; you have the same panels, radio, everything. Thank you for this instructable and allllll the photos!

Can you please be specific about what electronics I need to buy? This will be my first electronics project, so I am unfamiliar with what I'll need.

Do you think there's any way to avoid putting in an extra toggle by having the audio in hook into the "Cassette" controller? It's not like I'm ever going to use the cassette player.
galadriel in reply to galadrielMay 23, 2012. 2:26 PM
Hey, I got this working. Thanks for the pm advice, and thanks for the instructable :) This is great.
MACKattacksnipe says: Jul 29, 2010. 2:13 PM
mine is a 1997 Ford Explore and it had a 6 CD changer in it witch i took out cause it was broken any one know if this will work some how
GerGa00 says: Sep 12, 2009. 7:59 PM
So does the stereo need to have a cd player? Is there no way to do this mod without a cd player?
pickingrin (author) in reply to GerGa00Feb 16, 2010. 8:42 AM
No you don't need a CD player.  For my particular system I got the unit that required one since I have a CD player. Hope this helps!
srhadaham says: Jul 29, 2009. 11:59 PM
your stereos is one heck of a lot harder to get to than mine, i only have to undo two screws and a faceplate pops off and then two bolts to free the stereo
Nathan_ in reply to srhadahamFeb 4, 2010. 11:34 AM
Lucky. I had to take out my center console, the power mirror controls, the cover to the gear shift, and the plastic casing around the gear shift.
pickingrin (author) in reply to srhadahamAug 4, 2009. 1:56 PM
Which car is that?
srhadaham in reply to pickingrinAug 4, 2009. 2:54 PM
plymouth voyager, I'm not sure what year
srhadaham in reply to srhadahamAug 4, 2009. 3:00 PM
its a 1999 in case you care
gman2000watts says: Jul 17, 2009. 11:44 AM
great instructable, but as all the installers have told me...DO NOT use metal for a panel popper! it will damage the interior.
abadfart in reply to gman2000wattsDec 27, 2009. 1:32 AM
lol that doesn't mater in my car  about 70% of the trim is gone 
pickingrin (author) in reply to gman2000wattsJul 18, 2009. 12:48 PM
Great idea. For me there was only one spot under the dash that I couldn't grab with my hands. Another idea is to cover the screwdriver with a cloth.
Kontaminate says: Jul 24, 2009. 8:55 AM
How much did the "little black box" cost you on ebay?
pickingrin (author) in reply to KontaminateAug 4, 2009. 1:55 PM
$45
ac1D says: Jul 9, 2009. 2:33 PM
I have one question: What is all these thing on your keyrings?lol!
hack124x768 in reply to ac1DJul 10, 2009. 9:45 PM
Looks like grocery store cards and such.
pickingrin (author) in reply to hack124x768Jul 11, 2009. 6:38 AM
Yeah, I travel a lot so I've got grocery cards for pretty much every store.
ac1D in reply to pickingrinJul 11, 2009. 9:40 PM
dunno where u live, buy here we don't have grocery card lol.
slimguy379 says: Jul 9, 2009. 8:03 PM
my new deck came with an input, and i have an ash tray right below it and i ran the line through the ashtray and now i can play it like u awesome:). thanks for the tip.
JanetWitch says: Jul 8, 2009. 2:35 PM
BTW - GREAT photos!
JanetWitch says: Jul 8, 2009. 2:34 PM
Awesome! I can't wait to put one in!
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