Aftermarket radio wiring with stock SVT sub and amp.

MattZX3 · 01-23-2008, 11:16 PM

Hey, just wanted to post this up for all of you svt guys, helped out another member on here with this wiring.

If you want to replace the audio-pile with an aftermarket, but want to retain the stock sub, follow this wiring and you should be all set

When installing a deck in a 2003 Focus SVT I was able to integrate the factory sub amp using the extra 7 pin plug from behind the factory radio. the wiring in the plug is as follows:
white/green-
yellow/brown-
white/red- amp turn on (6volts)
white/black- column control(resistance)
brown/yellow- column control (power)
white/black- pre amp output (+)
grey/black- pre amp output (-)

I used a 249 OHM resistor to drop the amp turn on (white/red)voltage so that the sub doesn't pop when the radio is turned on/off. Using a male RCA connector, you can wire into the low level factory input wiring (white/black,grey/black) so that it will accept the female sub output on the aftermarket radio.

Make sure that the new deck has an adjustable/low-pass sub out, or you will need an adjustable crossover. Good luck, and have fun!!

Sonicbluezx3 · 01-30-2008, 03:01 PM

Got any pictures?

MattZX3 · 01-30-2008, 03:38 PM

i unfortunately do not...

i do believe another member or two have used this wiring, so hopefully they either have pics, or can pull the radio out to take some pics

pat247 · 02-26-2008, 09:07 PM

After searching around for wiring info for the stock SVT sub and amp, and unable to find any usable info. I decided to make a small "how-to" for you guys.

Solder and shrink wrap wiring harness connections

Wrap wire loom around wire bundles (so it looks good)

Strip single RCA cable and twist core wire and shield wire like shown.
Solder "male" spade connector to blue/white wire.

Solder Blue/White wire to the White/Red wire.
Solder RCA core wire to the White/Black (+) wire.
Solder RCA Shield (negative) wire to the Grey/Black (-) wire.

Shrink wrap connections

Will update with more pics of the sub wiring harness later.

If anyone has any questions I will answer them as best I can.

MattZX3 · 02-27-2008, 12:04 AM

look about two or three thread up and i posted about it, im actually going to merge those threads, because you have pictures..

when i did the install, i didnt take any pics.. so ill merge the two threads together

MattZX3 · 02-27-2008, 12:10 AM

threads merged

focusguy87 · 03-02-2008, 06:47 PM

this is great good jobs guys!

lildudeinacar · 04-03-2008, 05:18 PM

Just my luck, now i gotta buy a stuiped crossover..... and now i got to hope and pray that i dont screw up this simple wire job.

FOCUSSTDRIVER · 04-25-2008, 09:31 AM

um will this work on 2007 focus?

WUGcatsvt · 04-25-2008, 07:38 PM

double

WUGcatsvt · 04-25-2008, 08:31 PM

Okay... Ive Got a Problem I Guess.. So I am Connecting the Gray/black and white/black to the RCA and the white/red to the Blue/white that is on the harness adapter? Help me out here...

MattZX3 · 04-25-2008, 10:05 PM

white/red = remote turn on. some decks its blue, some its blue and whits, should be labeled though

the remote wire is on the harness for the aftermarket deck

02-26-2008, 09:07 PM	#4
pat247 Focus Enthusiast Join Date: Sep 2005 Fan#: 27781 Location: Oklahoma What I Drive: focus Posts: 521 FF Reputation: 19 Buy-Sell-Trade Rating: (17)	Aftermarket radio wiring with stock SVT sub and amp. After searching around for wiring info for the stock SVT sub and amp, and unable to find any usable info. I decided to make a small "how-to" for you guys. Solder and shrink wrap wiring harness connections Wrap wire loom around wire bundles (so it looks good) Strip single RCA cable and twist core wire and shield wire like shown. Solder "male" spade connector to blue/white wire. Solder Blue/White wire to the White/Red wire. Solder RCA core wire to the White/Black (+) wire. Solder RCA Shield (negative) wire to the Grey/Black (-) wire. Shrink wrap connections Will update with more pics of the sub wiring harness later. If anyone has any questions I will answer them as best I can. __________________ 2003 ZX5 SVT, Pitch Black, JRSC/BBK.

03-02-2008, 06:47 PM	#7
focusguy87 I AM DA FOCI FANATIC Join Date: Nov 2006 Fan#: 40962 Location: IL, Somewhere in the center & STL, Afghanistan What I Drive: 00 Red EvO & 03 TURBO BLACK SVT Posts: 3,683 FF Reputation: 6 Buy-Sell-Trade Rating: (6)	this is great good jobs guys! __________________ FOR SALE, SVT CLUTCH, SVT DIFF, MAGNAFLOW EXHAUST

04-03-2008, 05:18 PM	#8
lildudeinacar Focus Addict Join Date: Aug 2007 Fan#: 49485 Location: Grand Blanc MI, MI What I Drive: 2003 Black SVT Posts: 1,138 FF Reputation: 5 Buy-Sell-Trade Rating: (6)	Just my luck, now i gotta buy a stuiped crossover..... and now i got to hope and pray that i dont screw up this simple wire job. __________________ 2003 SVT ZX3 Build # 2002 Birth: 5/20/03 "You know you drive a SVT Focus when... you take evey single off ramp or turn at double the suggested speed. " Have you ever shifted so hard that you fart...

04-25-2008, 09:31 AM	#9
FOCUSSTDRIVER Focus Addict Join Date: Sep 2007 Fan#: 50034 Location: west chester, pa, PA What I Drive: 2007 pitch black zx4 st SAP1 Posts: 1,063 FF Reputation: 4 Buy-Sell-Trade Rating: (4)	um will this work on 2007 focus? __________________ 07ST ST Crew #82SAP Crew#19

04-25-2008, 07:38 PM	#10
WUGcatsvt Zipties required Join Date: Jul 2006 Fan#: 36697 Location: Pensacola, FL, FL What I Drive: 02 Vermillion SVT Posts: 8,669 FF Reputation: 61 Buy-Sell-Trade Rating: (15)	double __________________ "No, the Focus is SLOW and just kinda stays that way."-Joe GCR SCCA VP gumpcrew#10 Gulf Coast Region #12 - Me-45 DSP My Girl-451 DSPL Last edited by WUGcatsvt; 04-25-2008 at 08:54 PM.

01-30-2008, 03:01 PM	#2
Sonicbluezx3 .....NObama..... Join Date: Jun 2004 Fan#: 8674 Location: Cary, NC What I Drive: 05 Sonic Blue ZX3 Posts: 1,864 FF Reputation: 18 Buy-Sell-Trade Rating: (9)	Got any pictures?

04-25-2008, 08:31 PM	#11
WUGcatsvt Zipties required Join Date: Jul 2006 Fan#: 36697 Location: Pensacola, FL, FL What I Drive: 02 Vermillion SVT Posts: 8,669 FF Reputation: 61 Buy-Sell-Trade Rating: (15)	Okay... Ive Got a Problem I Guess.. So I am Connecting the Gray/black and white/black to the RCA and the white/red to the Blue/white that is on the harness adapter? Help me out here... __________________ "No, the Focus is SLOW and just kinda stays that way."-Joe GCR SCCA VP gumpcrew#10 Gulf Coast Region #12 - Me-45 DSP My Girl-451 DSPL

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