Focus Fanatics Forum banner

1 - 20 of 23 Posts

·
Registered
Joined
·
43 Posts
Discussion Starter #1
I tried the search function but maybe I'm just not using it right...

I have an 07 Focus ST that came with the Sony sound system & sub in the trunk. Is there any wiring harness available that allows me to use the factory sub with an aftermarket deck?

I stumbled on forum thread somewhere but the person had to splice all the wires in order to hook it up; there's gotta be a harness for this somewhere.

Any helpful insight appreciated!!
 

·
Registered
Joined
·
30 Posts
I did an aftermarket deck in my 2006 ST with the sony premium system. I wanted to keep the factory sub enclosure but upgrade the sub. The installer was ablet to fit in an 8 inch sub in the factory enclosure (with a little modification) and added a sub amp. This worked great for me...
 

·
Registered
Joined
·
433 Posts
I have an 05 SES and I ordered my after market deck off crutch field and if you enter your car as having the factory aubwoofer they send you the extra wiring. There is a thread on here somewhere with part numbers. I wrote them down but I'm not home or I would put them on here.
Posted via FF Mobile
 

·
Registered
Joined
·
43 Posts
Discussion Starter #5
I have an 05 SES and I ordered my after market deck off crutch field and if you enter your car as having the factory aubwoofer they send you the extra wiring. There is a thread on here somewhere with part numbers. I wrote them down but I'm not home or I would put them on here.
Posted via FF Mobile
If you could find that it would be helpful. I like the factory sub because it compliments the sony speakers real well - I just want to upgrade the deck and that is all.
 

·
Registered
Joined
·
1,445 Posts
metra part number 70-5521 is the harness you want. If you hook it up and the sub pops when the radio turns on or off you will need a voltage dividing network to drop the remote output voltage
 

·
Registered
Joined
·
43 Posts
Discussion Starter #7
Sweet! So you've confirmed this will work on the radio of my 07 ST? Pretty cheap priced harness too!

...I'm not too clear on what a voltage dividing network is though.
 

·
Registered
Joined
·
1,445 Posts
Yes it will work. The plug with the rca's on it is for the sub amp.

I am pretty sure you will be fine but if you hook it up and it pops let me know i will get you a diagram
 

·
Registered
Joined
·
43 Posts
Discussion Starter #9
It will probably be a few weeks but I have an older Sony deck lying around, I just need this harness and dash kit, but I'll let you know what happens! Thanks again!

Will my steering wheel controls still work?
 

·
Registered
Joined
·
1,445 Posts
no they will not. you will need the axxess awsc to retain that functionality. also your sony radio has to have wired remote capabilities
 

·
Registered
Joined
·
43 Posts
Discussion Starter #11
Well, the deck works, but I do get a pop sound when the amp fires up. It akso looks like I need an antenna adapter or something cause the focus one definitely don't fit.

Mind sending me the fix when you have a chance?
 

·
Registered
Joined
·
43 Posts
Discussion Starter #13
well, i dont want to. if it was a small pop i wouldn't care but if it can be fixed then I want to fix it.
 

·
Registered
Joined
·
299 Posts
Well, the deck works, but I do get a pop sound when the amp fires up. It akso looks like I need an antenna adapter or something cause the focus one definitely don't fit.

Mind sending me the fix when you have a chance?
The sub making a popping sound when you turn on the amp sounds like it's the amp itself. Nothing wrong with it.

Most amp's have a muting circuit that mutes the amp for the first few seconds of startup to eliminate that popping sound. Sounds to me like yours just doesn't have that feature.
 

·
Registered
Joined
·
43 Posts
Discussion Starter #15
I don't think that's the case - if it was then the sub would pop with my factory deck in as well. Keep in mind here I'm using the factory sub, and the popping only happened once i put an aftermarket deck.

I researched the issue online and the common fix is to install a resistor/capacitor that causes a delay in the amp turn on.
 

·
Registered
Joined
·
299 Posts
I don't think that's the case - if it was then the sub would pop with my factory deck in as well. Keep in mind here I'm using the factory sub, and the popping only happened once i put an aftermarket deck.

I researched the issue online and the common fix is to install a resistor/capacitor that causes a delay in the amp turn on.
If you are using the factory amp as well, then that's probably the reason. The factory HU should have a minor delay to turn on the amp and probably mutes it as well from the HU. Since your aftermarket deck doesn't do that, you have popping.
 

·
Registered
Joined
·
1,445 Posts
the problem is most ford factory amps use a 5 or 6 volt turn on. All aftermarket head units use a 12v turn on which causes the popping sound. If you drop the voltage down it will eliminate the pop.
 

·
Registered
Joined
·
299 Posts
the problem is most ford factory amps use a 5 or 6 volt turn on. All aftermarket head units use a 12v turn on which causes the popping sound. If you drop the voltage down it will eliminate the pop.
Not sure if that's the reason.

But if it was then add a resistor in line with the remote lead. A 1.5k ohm resistor should be ok.
 

·
Registered
Joined
·
764 Posts
Can somebody help me with hooking up the factory sub to an aftermarket hu. I bought the adapter that was posted in this thread and the plug that comes out of the rca wires doesnt plug into anything. Theres two blue wires that come off and i think i have them in the right spot but im not totally sure. Theres a third factory harness that isnt plugged in and i believe this is for the sub but the rca plug isnt going to plug into it. What am i doing wrong or was that the wrong harness posted??
 
1 - 20 of 23 Posts
Top