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Old 07-10-2012, 07:17 PM   #1
MtnXfreeride
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Member#: 228010
Join Date: Oct 2009
Chapter/Region: NESIC
Location: Maine
Vehicle:
2012 WRX Prem Hatch
Dark Gray Metalic

Default Stock USB with Aftermarket Radio - NO Cutting

Looking to use your armrest USB port with an aftermarket radio and not in the mood for cutting the stock harness? I just did the quick mod to my car and it works great.

Here is what is needed:

This is a link to buy the connector that fits the end of the stock USB plug harness: http://www.mouser.com/ProductDetail/...u3jONiJIhfY%3D



A perfect fit:

The part came in ~4 days and didnt cost much considering.


The only other "part" YOU will need (I needed extra parts to map out the wiring) is an old USB cable you dont mind cutting.

You will also want a soldering iron, electrical tape, and a prying tool to remove the trim around the radio.



All you have to do is solder the following (the Hirose connector is labeled 1-4 and the outside is ground.
Connect the end of an old USB cable you cut to the following pins:
1. Black
2. Red
3. Green
4. White
Finally, attach the wire that was wrapping the colored wires to the outside of the Hirose connector.. thats it, plug and play!



To make this I cut a second USB and used a continuity tester to map out which pin on the Hirose harness goes to which USB pin. (This step you dont need to do unless you care to double check my work)


Testing pins: (Again not unless you want to double check my pinout)

Chopping an old unused USB cable to solder to the harness:

Color coded:

My terrible solder job:

Wrapping in electrical tape - careful not to touch pins together! or disconnect anything!

Testing one last time to ensure connections are solid


Worked perfect - You can make this as professional as you want with better soldering or maybe there is a clip that can attach to those pins? I would recommend buying 2 hirose connectors for this job because the pins are brittle. I had 2 pins break, but it actually made it easier to solder without them in the way.
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Old 07-10-2012, 10:42 PM   #2
Psyk
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Join Date: Jul 2005
Chapter/Region: Tri-State
Location: Bergen County
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2012 SWP WRX Hatch
RIP 05 WRX

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Thanks for the info and pics! I'll be saving this one for the future...haven't even received my 2012 yet, haha
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Old 07-17-2012, 08:13 PM   #3
noblepete
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Thank you for the tip. I've ordered the connector you mentioned, which came in today, and I will be attempting my install this weekend, weather/work permitting.
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Old 07-19-2012, 05:12 PM   #4
Joker_927
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Really cool! Thanks!
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Old 07-19-2012, 11:38 PM   #5
MtnXfreeride
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2012 WRX Prem Hatch
Dark Gray Metalic

Default

Quote:
Originally Posted by noblepete View Post
Thank you for the tip. I've ordered the connector you mentioned, which came in today, and I will be attempting my install this weekend, weather/work permitting.
the part does come decently quick.. and you can prep the part so all you have to do in the car is pop off the dash trim and find the plugs to plug in.
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Old 08-20-2012, 11:34 AM   #6
Spincity9080
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This is Awsome.... Thanks I as well will be doing this
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Old 08-22-2012, 01:35 AM   #7
gunz4me
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Thanks for the tutorial. I'll be doing the same thing as well.
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Old 08-23-2012, 05:32 PM   #8
zmfc
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Great tutorial. hope to do to my next car when i get it.
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Old 09-15-2012, 01:27 AM   #9
goloch
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First of all, thanks to the original author - brilliant find!

Just did this as part of my JVC HU install and discovered a potential problem.

It seems that the length of the USB cable attached to the Hirose connector affects power to the USB device. I left significantly more cable than shown above and only some of my devices are recognized through the console USB to Hirose hack. Devices with no cables or short cables (USB drives, JVC BT adapter) work, but long cables (iPod) do not.

However, everything was recognized if connected directly to the HU's rear USB. I suspect it's a power problem over the USB extension. I'm going to take it out in the morning and shorten the cable to see if that fixes it.
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Old 09-18-2012, 12:57 PM   #10
goloch
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WR Blue

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Shortened my original 2 ft cable down to 4 inches and everything works great now. Short cables definitely seem to be a must!
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Old 01-22-2013, 07:28 PM   #11
wrx777sti
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World Rally Blue

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Thank you MtnXfreeride,

I will be doing this mod in a very short time and I am so glad I found your writeup.

I was wondering how to do the same thing with the AUX port in the armrest box ?

Any idea anyone ?

Thanks
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Old 02-22-2013, 04:04 PM   #12
MtnXfreeride
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2012 WRX Prem Hatch
Dark Gray Metalic

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Quote:
Originally Posted by wrx777sti View Post
Thank you MtnXfreeride,

I will be doing this mod in a very short time and I am so glad I found your writeup.

I was wondering how to do the same thing with the AUX port in the armrest box ?

Any idea anyone ?

Thanks
There is a guy on this forum who sells the adapter for the 3.5mm jack. I believe its user SVXdc - PM him and ask. He sells these adapters I show here premade too for a higher price.


Also, to the person above who said the long JVC HU cable paired with this doesnt power their iphone:
My JVC headunit has that long USB cable and I have no issues charging and powering my iphone which sits in the armrest all day/night as an MP3 player. (I dont use it as my primary phone anymore). So maybe its your JVC HU that isnt putting out enough power - or the wire you used is too thin.
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Old 03-03-2013, 08:58 PM   #13
TheSTIuation
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SWP

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MtnXfreeride,

Is that the KW-NT800HDT? If so, I just picked up that unit. Question for you, can't I just run the USB already connected to the JVC to the arm rest and replace the USB that was there previously or do I need to order that connector? I have an 11 STI.

Mark
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Old 03-03-2013, 09:31 PM   #14
TheSTIuation
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SWP

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Quote:
Originally Posted by TheSTIuation View Post
MtnXfreeride,

Is that the KW-NT800HDT? If so, I just picked up that unit. Question for you, can't I just run the USB already connected to the JVC to the arm rest and replace the USB that was there previously or do I need to order that connector? I have an 11 STI.

Mark
Oh and I apologize in advance for my lack of knowledge on this situation. First time going aftermarket.
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Old 04-27-2013, 11:33 AM   #15
Haptic_
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Can we use any USB cable for this? I have a lot of ipod cables I don't use anymore and I prefer to keep my micros.
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Old 04-29-2013, 10:38 AM   #16
del_tron
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I don't know if the wires are the same inside an iPod cable.
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