2012 Subaru Outback HD Radio Wiring Harness

It sounds like you are trying to install a Clarion PF3494 head unit into a 2001 Subaru Outback and you have run into compatibility issues. The Aerpro APP8CLA4 adapter you bought does not seem to fit your head unit.
In this situation, you have a few options:

1. Look for a custom installation kit: Some car audio retailers offer custom installation kits specifically designed for your make and model of car. You may be able to find a kit that includes the necessary wiring harness and adapter for the Clarion PF3494.
2. Check the Clarion website: Clarion may have information on their website about the wiring harness and adapter required for your specific head unit and vehicle.
3. Contact a professional installer: A professional car audio installer may be able to help you find the correct wiring harness and adapter for your head unit and vehicle, or they may be able to custom build the necessary wiring for you.

I recommend contacting a professional installer if you do not feel confident wiring the plugs yourself, as incorrect wiring can cause damage to your head unit and vehicle.
If you can provide the specific information about the pins and connections of the Clarion PF3494, I may be able to assist you further.

Edited the first part for clarity.

Hyundai Santa Fe SE 2009 - SYSTEM WIRING DIAGRAMS

https://portal-diagnostov.com > 2020/03/26 > radio-hyu...

Mar 26, 2020 - RADIO - Hyundai Santa Fe SE 2009 - SYSTEM WIRING DIAGRAMS Radio Wiring Diagram, with Amplifier & Rear Seat Entertainment (1 of 2).

• 
  

  All Wiring Diagrams for Hyundai Santa Fe Limited 2009

  https://portal-diagnostov.com > 2020/07/22 > all-wiring...
  
  Jul 22, 2020 - All Wiring Diagrams for Hyundai Santa Fe Limited 2009 ; Manual A/C Wiring Diagram (2 of 2) for Hyundai Santa Fe Limited 2009. Rear A C Wiring ...

Hyundai Santa Fe (2006-2012) EMP300RDS pinout

https://pinoutguide.com > ... > Hyundai Santa Fe pinouts

Dec 10, 2019 - Hyundai Santa Fe (2006-2012) EMP300RDS pinout ... Audio Head units > Hyundai Santa Fe pinouts · 24 pin Hyundai Head Unit connector layout

2009 Hyundai Santa Fe Radio Wiring Harnesses - Crutchfield

https://www.crutchfield.ca > ISEO-rgbtcspd > ymm > 2...
Need a radio wiring harness for your 2009 Hyundai Santa Fe? Get free shipping and free lifetime tech support with your order.

Question edited into English :>D

2004 Subaru Impreza Car Radio Wiring Guide - MODIFIEDLIFE

https://www.modifiedlife.com > 2004-subaru-impreza-c...
Feel free to use any car stereo wiring diagram or factory radio wire colors that are listed on Modified Life but keep in mind that all information here is ...

Radio Wiring Diagram for a 2004 Subaru Impreza Wagon - Fixya

https://www.fixya.com > Forum > Car Audio & Video
Nov 15, 2019 - ... 2007 Subaru Impreza Car Stereo Wiring Diagram. Car Radio Battery Constant 12v+ Wire: Blue/Red Car Radio Accessory Switched 12v+ Wire: Yellow/Green
SOLVED: I need the wiring diagram for a 2004 Subaru - Fixya
Nov 15, 2019
Need 2005 subaru impreza stereo wiring harness diagram
Nov 21, 2019
Subaru baja wiring diagram - Fixya
Nov 20, 2019
Radio wiring color codes for a 1998 subaru outback sport - Fixya
Nov 20, 2019
More results from www.fixya.com

Subaru Impreza WRX 1993-2007 Car Stereo pinout

https://pinoutguide.com > ... > Subaru Impreza pinouts
Dec 9, 2019 - Pin #. Function. WRX Factory Radio Connector Wire Color ( wires go to WRX's Speakers, etc.) Subaru After-Market Harness Wire Color

How To Subaru WRX Stereo Wiring Diagram - My Pro Street

https://my.prostreetonline.com > 2016/02/15 > how-to-s...
Feb 15, 2016 - Use our WRX Stereo Wiring schematic to complete your aftermarket stereo install into your Subaru Impreza WRX or STI.

Is there a trailer hitch wiring that could be causing your problem??

should have gone with a plug and play connector

use this guide
http://www.modifiedlife.com/2003-subaru-outback-wagon-car-radio-stereo-wiring-diagram

check your fuse box and see if your radio fuse is blown if it isnt you should try connecting the yellow and red wires from the radio and the harness all together and see if it comes on. if it does theres a problem with the main power supply (red wire from the harness). quick fix : run a new wire from the red on your stereo to the fuse panel and connect it to the radio fuse.

I assume you're referring to the Speed Sensor, and the 2 wires coming from the Speed Sensor? Is your speedometer totally inop, or is it giving improper, or sporadic indications? I'm not familiar with Subaru, but wiring for speed sensors are generally the same for most 96 and newer vehicles. That 2-wire harness typically runs to a disconnect... to the PCM... maybe another disconnect... speedometer. If you have access to schematics, or wiring diagrams, you would need to obtain a few plug and pin numbers, locate the components, then trace a few wires. I'd suggest first running a diagnostic in order to obtain any possible fault codes, and use that as a good starting point.

in the trailer wiring harness that would have been installed by you or your mechanic prior to asking this question

inspect antenna connection at rear gate wiring harness passthru,if this car is a wagon the rubber boot on drivers side rear gate holds the harness from getting pinched,remove this boot and inspect harness carefully you should find broken wires,repair the wires,then enjoy your a.m stations again

The sell a nifty little invention at Wally-World. Its called a wire harness...look for it in the auto parts section. it will wire directly to your stereo wires and then just plug & go... if your subaru wires are missing the harness on the end, its a whole different ballgame, and its gonna be fun...try this...

Car Radio Battery Constant 12v+ Wire: Blue/Yellow
Car Radio Accessory Switched 12v+ Wire: Yellow/Red
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Green
Left Front Speaker Positive Wire (+): Brown/White
Left Front Speaker Negative Wire (-): Green/Black
Right Front Speaker Positive Wire (+): Red/Yellow
Right Front Speaker Negative Wire (-): White/Black
Left Rear Speaker Positive Wire (+): White/Red
Left Rear Speaker Negative Wire (-): Red/Green
Right Rear Speaker Positive Wire (+): Blue/Green
Right Rear Speaker Negative Wire (-): Red

Let me know how it goes!