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Old 12-05-2003, 05:22 AM   #1
IA Performance
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Dark Gray

Default 04 WRX/STI Antenna WIRING within + picture

From what we've found the antenna power wire remains the same for:
- Impreza 1993-2007
- Impreza 2008-2010 with factory Navigation Head Unit. Will not work on nonNAV equipped cars.
- Legacy/Outback 1998-2009, will not work with cars that have upgraded from base model stereo system
- Forester 1998-2010
- Forester 2009-2010 with factory Navigation Head Unit. Will not work on nonNAV equipped cars.
- Saab 92-x 2004-2005

Chances are if you wired up your 04 wrx or sti (and most all other 04-present subarus) you've noticed that your radio reception was exceptionally poor. There are 2 reasons why.

1. The rear glass mounted antenna unit needs to be turned on by a 12v power source. Here is a picture depicting the desired wire on the chassis side of the harness.

Aftermarket radios usually denote which blue wire is the antennas turn on by writing on it, or giving it a white stripe. Please consult your owners manual versus making assumptions on which wire is correct. The antenna will only be on when the deck is turned on by wiring it to the switched 12v line or (where applicable) to the blue antenna power wire coming from the after market head unit.



2. Do not forget to fish out the coaxial cable from behind the radio dash area and plug it into your headunit. The item looks like this.



Please make note of which wire and maybe even make this guy a sticky thread to help out others that are pulling out their hair over weak radio reception.
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Last edited by IA Performance; 01-05-2011 at 12:12 PM.
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Old 12-05-2003, 10:45 AM   #2
Haven
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Where is the harness located? Can you just connect it to the blue wire in that same harness?
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Old 12-05-2003, 10:48 AM   #3
jtgray_10
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Just a guess, but behind the radio, maybe.
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Old 12-05-2003, 12:37 PM   #4
IA Performance
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that is the stock radio harness. I kind of forgot that :/
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Old 12-19-2003, 02:48 PM   #5
WRC-STI
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That wiring tip was just what I needed. THANKS! I now get good FM reception but AM is still pretty poor. Any ideas? Where is the actual antenna? Thanks for any help.
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Old 12-19-2003, 05:01 PM   #6
IA Performance
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the actualy antenna is in the rear glass. It looks like the defroster but runs vertically down the middle I believe. Can't help ya with AM Sorry.
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Old 12-20-2003, 03:34 PM   #7
spacemonkey
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somewhat related... where are the stock wires for the read deck speakers located? is it those two wires and clip in the middle of the deck area?

thanks
monkey-
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Old 12-20-2003, 03:54 PM   #8
skyhawk
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Follow this link to Ravensblade's website. Look for the 2002 radio wiring diagram. Everything matches up to the 04 harness except for pin 14, which he has labled as not being used but is the power antenna lead on the 04 models. I used this diagram for my radio replacement and everything works perfectly. Thanks to Ravensblade for his website which has been alot of help to me. Keep up the good work Ravensblade. And good luck to anyone replacing their stock radios.

You will find the wiring diagrams in the Tech docs and informational pages on the left index.

Last edited by North Ursalia; 10-16-2012 at 10:13 AM.
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Old 12-20-2003, 10:28 PM   #9
brunetmj
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The actual antenna is across the very top of the window. At least thatís what I thought I saw. I just had that section off today looking for the defrost wires. The module is made by clarion.
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Old 12-31-2003, 12:23 PM   #10
Extraze
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Quote:
Originally posted by WRC-STI
That wiring tip was just what I needed. THANKS! I now get good FM reception but AM is still pretty poor. Any ideas? Where is the actual antenna? Thanks for any help.
if you remove the apilar (on the drivers side) ... there is a wire comming up on there that i dont recall seeing in the 02's ... i think that wire might be the antenna ... not sure
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Old 01-06-2004, 08:38 PM   #11
2jz-gte
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04 STi White/Silver

Default blue or red wire?

I have a sony head unit(CDX-c7850) and it has a blue wire labeled "ant rem max .1A". Is this the wire I should connect to the solid white wire or should I just use my 12V/ACC red wire?

Thanks
Ben H.
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Old 01-06-2004, 09:53 PM   #12
IA Performance
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yup, connect your blue headunit wire to the white one.
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Old 01-06-2004, 10:19 PM   #13
jaypride
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Quote:
Originally posted by spacemonkey
somewhat related... where are the stock wires for the read deck speakers located? is it those two wires and clip in the middle of the deck area?

thanks
monkey-
There are no speakers in the rear deck. The rear speakers are in the back doors. The Legacy's have a single sub in the rear deck, but I don't think any Impreza's do.
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Old 04-21-2004, 01:54 PM   #14
chaddeus
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Hey guys. I am receiving FM signal but still not satisfied compared to my previous BMW where I get excellent signal on all the channels I listen to.

Could this be a problem OR simply just a lousy antenna provided by Subaru?

Based on the picture shown above, must I actually connect the white wire and the red wire together???

- Charles
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Old 04-21-2004, 02:12 PM   #15
robmarch
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Quote:
Originally posted by chaddeus
Hey guys. I am receiving FM signal but still not satisfied compared to my previous BMW where I get excellent signal on all the channels I listen to.

Could this be a problem OR simply just a lousy antenna provided by Subaru?

Based on the picture shown above, must I actually connect the white wire and the red wire together???

- Charles
do you have metallic tint?
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Old 04-21-2004, 03:21 PM   #16
chaddeus
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Quote:
Originally posted by robmarch
do you have metallic tint?
I am not sure if mine is a metallic tint. I use HuperOptik and its supposed to be the type of tint that would not interfere with onboard radar detector.

So I am not sure if this is the problem.

- Charles
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Old 07-26-2004, 10:27 AM   #17
rich728
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Default

Quote:
Originally Posted by East Coast Scooby
Chances are if you wired up your 04 wrx or sti you noticed that your radio reception was exceptionally poor. Reason being it needs to be amplified via a 12v power source. Here is a picture depicting the desired wire



The antenna will only be on when the deck is turned on by wiring it to the switched 12v line.

Please make note of which wire and maybe even make this guy a sticky thread to help out others that are pulling out their hair over weak radio reception.
I just want to make sure this is correct. Has anyone done this?
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Old 07-26-2004, 11:40 AM   #18
conker69
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Quote:
Originally Posted by East Coast Scooby
the actualy antenna is in the rear glass. It looks like the defroster but runs vertically down the middle I believe. Can't help ya with AM Sorry.
I don't think so. I think it is the front glass, at the bottom. At least in MY04 WRX there are a series of 'wires' in the bottom of the front windshield. But really this is besides the point. I forgot to hook up this wire at first as well but thanks to your thread (I searched) I corrected it.
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Old 07-26-2004, 12:21 PM   #19
robmarch
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it's in the back glass. I believe at the top, I'll check though.
the wires in the my04 WRX are heated wipers for the winter package, perhaps?
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Old 07-26-2004, 12:22 PM   #20
SLKWrx
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Quote:
Originally Posted by rich728
I just want to make sure this is correct. Has anyone done this?
I'm going to have to say yes.. many many people with the 04 sti's have put radio's into their cars and have figured out that this is the wire to the powered antenna, but I think east coast scooby was just making it more public knowledge. plus east coast scooby wouldn't lie... or would they..

-- Steve
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Old 07-26-2004, 12:24 PM   #21
SLKWrx
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Quote:
Originally Posted by conker69
I don't think so. I think it is the front glass, at the bottom. At least in MY04 WRX there are a series of 'wires' in the bottom of the front windshield. But really this is besides the point. I forgot to hook up this wire at first as well but thanks to your thread (I searched) I corrected it.
The wires for the antenna are the top 2-4 wires of the rear glass. The front wires are a defroster for your windshield wipers a la cold weather package.

-- Steve
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Old 07-26-2004, 12:31 PM   #22
conker69
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Quote:
Originally Posted by SLKWrx
The wires for the antenna are the top 2-4 wires of the rear glass. The front wires are a defroster for your windshield wipers a la cold weather package.

-- Steve
Cool. Thanks for clearing that up. Everyone else ignore my other post. Sorry...
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Old 07-26-2004, 12:38 PM   #23
Vidiotgamer
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wow,didnt know anyone used the radio in the subie,hehe,i watch tv or listen to cd's .
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Old 07-26-2004, 06:44 PM   #24
STiMULi
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Ceramic tint is available now with the same properties of metalic except the RF loss. I had this problem and it was resolved with ceramic. Metalic will kill AM reception and it also distorts the frequencies of high powered stations.

Ceramic is usually lifetime tint...
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Old 07-26-2004, 08:20 PM   #25
rich728
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how could i tell if it were activated from the trunk?

besides hearing the radio.

could i check for power somewhere?
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