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Subaru Outback '07 - GX-204KH stereo - DIY Aux Mod - $2.85 total.

GX-204KH Aux Mode DIY

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#1 JonChaka


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Posted 01 October 2018 - 04:04 AM

We have recently purchased an '07 Outback to replace the Magna the missus was driving.
This guide is for the GX-204KH Stereo.
The 8pin Aux Connector already had 3 wires for another function, this mod doesn't affect that.

Rather than throw several hundred at a facia / double din H/U, I scoured the net and found enough info to add the Aux port for $2.85.
$2.85 for 1M of cable and a female 3.5mm inline stereo socket from JayCar.

I thought I'd share how to do it since most of the info was spread around.
The dirty bench isn't mine.


You need:
Either a doner Aux Cable, or:
1-3m of twin core line level audio cable (Left, Right & Ground)
A suitable plug/socket (You can choose RCA or 3.5mm)



Phillips Screwdriver
Soldering Iron
Drill & Drill-bit bigger than the cable width.


If using a donor cable:
You will need to pass the cable through the hole first and then tie the knot before soldering, as the plug/socket won't fit through the hole.

Remove the stereo.
There is multiple write ups, youtube videos and other guides on this, so I won't be covering that..

Once out, do the following:

Remove the screws on both sides.


The unit will pull away from the front easily.

Remove the 3 screws on each side.

Remove the screws on the back.
There are 2 longer screws here, make note of them.

Remove the screws and ribbon cable to release the circuit board.
The ribbon cable may be stuck, try grab as close to the socket and pull out AFTER disengaging the brown part of the clip.

The bottom of the PCB, Aux Socket location.

Solder on the audio cables to pins 1, 2 & 3 then bridge pins 4 & 7.
The factory socket has a switch inside that tells the Head unit to enable to AUX Mode.
Bridging these pins will permanently enable the AUX mode for use.


Tie a knot in the cable around 10cm / 4 inches. This cable will pass through a inner hole in the stereo casing directly near the solder point.
The knot will prevent the cable being ripped out.

I didn't take another photo here, I forgot to reconnect the CD Ribbon, so will update....

I drilled a 5mm hole behind the CD section of the head unit.
There is approx 20-30mm of space there, more than enough to feed the cable up and out.
I attached the 3.5mm socket after. No photos, but you can find that info online.



It works!

My plan is to use a blue tooth car receiver off ebay that has the prev, forward and pause buttons. When it arrives I'll update.
In the mean time I just pushed the cable out the bottom of the passenger side directly below the head unit area.

#2 motoboy76


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Posted 11 October 2018 - 07:20 AM

Very nice mate, great little mod.....

Also tagged with one or more of these keywords: GX-204KH, Aux Mode, DIY

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