aftermarket sub with factory wiring

[DemonWRX]

If you have the navi HU, this thread is real helpful....and the ae64 guy said he can make you the pinned wires missing so that you can add a sub to the sub-out factory harness

Subwoofer & Navi - NASIOC

[04wrxnoob]

I have a 04 wrx and I bought a underseat sub and hooked it up

Sent from my R800x using Tapatalk 2

[DemonWRX]

well, if you already have the under seat factory sub, and it is hooked up and working, you would unplug the cable from the sub, and then use an adapter to convert that wiring to an amp.....this one might work, you would need to compare your cable to this socket.

Wiring Harness for Subaru subwoofer harness

If that does not match the wires your current sub harness has, you could simply cut off the plastic jack and splice your leads/RCAs off the factory sub harness wires.

[free2be4ever7]

so say i don't use the speaker wire from the rear speakers ( although considering ), i read on a nasioc forum that the sub wire adapter ( t fitting ) doesn't come installed from the factory. now, i realize this guy could be wrong but I'm hoping someone has a definite answer on this. id prefer not to rip my entire car apart to install a wire harness from the HU to the rear of the car. but it is doable for me.

[DemonWRX]

OK, so you would acquire a 'T harness' (by either buying a used one, buying from the dealer...though I think it is only available if you got the whole sub kit....or you could make one using the pigtails from ae64).

Once this is in your possession, you would:

1) pull out your HU
2) feed the 'T harness' wire through the HU opening in the dash and out through the bottom of the dash
3) plug your 'T harness' into the HU
4) plug your factory wiring harness into the 'T harness'
5) reinstall the HU
6) disassemble the center console
7) secure the long part of the 'T harness' that is hanging from behind the dash to the area covered by the center console
8) reassemble the center console over the secured harness....leaving the end poking out, leading under either driver's or passenger's seat
9) install amp under same seat
10) run post-amp speaker wires out from under the other side of the seat....under door-sill trim to back of car
11) install sub/sub-enclosure in back of car.

DONE

[cflip2x]

I would order the Breakout Harness It would make for a cleaner install. If you just buy a generic one from ebay you wont receive the steering wheel controls.

[free2be4ever7]

Impressive, thanks!

[DemonWRX]

I would order the Breakout Harness It would make for a cleaner install. If you just buy a generic one from ebay you wont receive the steering wheel controls.

nice catch....I didn't even see that one on their site (originally) as they have so damn many harnesses/pigtails/adapters

[04wrxnoob]

Ok so on the factory under seat sub T harness what wires do I splice to add RCA to?

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[DemonWRX]

This post at IWSTI has the pin-out info for the stock t harness.

You would want to splice one RCA to 'Right Rear +' and 'Right Rear -'....the other RCA to 'Left Rear +' and 'Left Rear -' for the sound signal to get to the amp.

You would want to run new wires for + and ground to power the amp itself.

Connect the harness ground wires to the amp ground.

Connect the '+12V remote on' (if there is one) to the amp (many amps have a place for the on signal)...if either your amp does not have a signal on input, or your harness does not have the signal on lead, you would want to make sure your amp power is coming from a location that is activated by the key being turned on rather than direct from the battery......or you *could* install a power switch in your dash that cuts power to the amp if you choose, though that is not 'correct', strictly speaking.

[rexxx0486]

My accessory tech also said to look into a conversion harness online but said that he would just order the kicker sub from subaru (of course)

[DemonWRX]

Honestly, you can get much better quality than Kicker for the same money....just say'n....especially when you factor in the Subaru parts markup.

[free2be4ever7]

Just installed my aftermarket amp and sub using my factory head unit. Super easy install I'm very happy with outcome.

All I needed to order ( since I had the sub/box and amp ) was a breakout harness and speaker wire to RCA converted.

The breakout harness was perfect for the install, and super easy. All the wires were labeled so wiring the speaker wire to rca's converter and the remote wire was easy.

Put the amp under the seat and ran the speaker wire to the sub. You can't even tell I have a sub until I turn up the music.

Here's the breakout harness: http://ae64.com/20-pincombinedharness.htm

And the speaker wire to RCA converter:
http://item.mobileweb.ebay.com/viewi...d=200659452988

Attachment 104817

Oh yeah this is a temp box. It's far to large.

[DemonWRX]

nice job

[11blackwrx]

Looks good, but the box is too big for my taste