Hi i have a st 170 no sub i have a aftermarket sub amp and stereo is there a power wire already in the car for sub that i can use... As i no some come with subs so would that wiring be there thanks glyn

 

haven the same trouble as you... if i find out anything al let you know ok...
what is your set up that you are going to put in?? cheeRS

 

I've just installed the factory subwoofer in my ST170 using my Sony CDX - GT420U headunit as the 9006 I got with it has issues with loading cd's.
The wiring was already installed from front to rear (which I understand is true with all ST170's) so I just modded the RCA sub output and amp remote from the Sony to suit the Ford wiring. Loads of people will tell you it can't be done, but it can - you do need a HU with a sub output though.
The standard wiring is already connected to a constant positive feed and ground, but it's not a heavy high ampage feed cable and may not suit the particular amp you're going to use. You'll also find that on the boot end of the sub loom the plug has two red wires (+), two black wires (-) and three white wires with a red stripe - one of white/reds is the + signal input, one is the - or screen input, and the other is the amp remote. Nice of Mr Ford to make that confusing ?????

If you're fitting a complete aftermarket system I'd run all new cables to be on the safe side, but if you can get hold of a factory ST subwoofer, I can recommend that very highly - very stealth, and excellent sounds.

If anyone needs the wiring info for connecting the Factory sub to an aftermarket headunit, I'm happy to share my knowledge.

 

I have recently bought a st170 with the factory subwoofer in already and amp but it isnt working at all i do have a aftermaket head unit in a pioneer, however never had the original headunit in when i purchased it do i need to change the wiring on the subwoofer to make it work with my headunit? Any help would be much appriciated???
Regards Danny

 

Hi Danny,
Providing you have the loom which runs rear to front for the factory sub, and your Pioneer Headunit has a dedicated sub output, it's very simple.
Take a single RCA lead (you sub out should be mono so you only need to connect to one side - left or right) - cut off the plug from one end to make a short lead and strip the wires so you have the inner insulated wire and the braided screen.
On the plug which comes up from the sub loom you should see the wires as the diagram below;




You need to connect the inner insulated wire on your RCA lead to the White and Black wire on the plug (pin 2), then the screen from the RCA to pin 1, which is a Grey and Black wire, and finally, you need to connect the amp remote wire from your headunit to pin 5 which is the White and Red wire.
Make sure your connections are good - soldered is best - or you may find you get a hum from the sub.

Make sure you set your low pass filter, on the headunit, if you have one for the best results.

One last thought - If you had the 9006 Headunit in the car and the sub wasn't working with that connected, might be worth looking the the sub amp fuse which I think is number 24 in the fuse box under the bonnet.

Good luck, hope you get things sorted.

Pete

 

Thankyou for the reply pete sounds very helpfull i shall try the wiring tomorrow and let u know how it goes didnt realise the control wires were with the steering wheel controls also checked the fuse and it was blown just replaced it and it hasnt blown again so hopefully it should be fine with the right wiring

 

Cheers for the help it works a treat and i am very surprised to the power u can get out of the subwoofer its brilliant and thankyou for the reply.
Regards Danny

 

Sorry for resurrecting an old thread but im in the same boat as many on here. Got my ST170 recently, picked up an OEM sub off of ebay and put in a 30amp fuse in spot 24. Sub not working!!! So pulled out the stereo (after market Sony unit with sub output) and found the Amp Remote wire (blue one) is not connected to anything. Do i need to tap this into another wire or am i missing something else?

Any advice will be great, cheers, Rich.

 

Not a problem always happy to try and help, Yes the subwoofer remote from the back of your sony headunit now needs connecting to the cars wiring loom so it can turn the subwoofers amplifier on when the headunit is powered up. To do this u need to use the connector block from the steering wheel controls as shown in the diagram posted above by pampy. Its pin 5 and the cable should be white and red if u connect your headunits remote wire to that it should turn it on, also have u connected the phono lead from the back of you sonys headunit into the cars standard wiring???
Regards Danny

 

Hi mate, thanks for the help. That seems simple enough, I will just tap into the cable at pin 5. As for the phono lead to the standard wiring, I'm lost with this. Is there any simple instructions for this, im awful at this kind of stuff!

Thanks again.

 

There isnt really a simply diagram to follow as such however when i get home i will take a photo of the connections i have had to do and how i striped the phono cable because if u strip it incorrectly u will here a permanent buzzing or interferance sound coming from the sub which is very annoying, and ill tell u which part of the cable goes to which wire on the steering wheel control plug after that it should work a treat, have u got the option to adjust the subwoofer setting in the sony headunit u have??

Regards Danny

 

Top man, cheers Danny. My Headunit does have setting to adjust the sub. Just been over halfords and they want £30 to wire it in so if i can do it then all good!
Will await your response and see if i can get it working. Thanks again.
Richard.

 

Hi mate, just wondering if you had a chance to take some pics of the wiring set up that you used?

Cheers mate.

 

Sorry to bring this up again...but I'm debating with the buzzing sound from the subwoofer.

Can you explain @digibox92 how to do this correctly? I've got everything plugged and got an old phono cable and stripped it but I think I maybe got something wrong...

 

Hi have you got the subwoofer powered and working, but it's now buzzing while no music is playing? 🤔
if so the sheild around your cable is touching something on the stripped phono end behind the head unit?
failing that when you power down the stereo/sub can you hear the sub sort of pop on power down if so that could be a bad earth on the subwoofer end to the chassis of the car 🤔

 

Got it all working mighty good but when transitioning between musics or when I turn the radio on, until it reads the pen (JVC headunit), I can hear the buzzing.

If it's the cable, do you advice in any specific cable? Might well try it now that I have the headunit out...

 

Hi there mate, hope you're well, with regards to installing the standard st170 sub, I'm buying the car Friday 3rd February 2023, it comes with the subwoofer installed and a pioneer head unit, the sub isn't currently connected to it and I'm just wondering how you went about making it all work together?
kind regards

David


WQUOTE=pampy;6029350]I've just installed the factory subwoofer in my ST170 using my Sony CDX - GT420U headunit as the 9006 I got with it has issues with loading cd's.
The wiring was already installed from front to rear (which I understand is true with all ST170's) so I just modded the RCA sub output and amp remote from the Sony to suit the Ford wiring. Loads of people will tell you it can't be done, but it can - you do need a HU with a sub output though.
The standard wiring is already connected to a constant positive feed and ground, but it's not a heavy high ampage feed cable and may not suit the particular amp you're going to use. You'll also find that on the boot end of the sub loom the plug has two red wires (+), two black wires (-) and three white wires with a red stripe - one of white/reds is the + signal input, one is the - or screen input, and the other is the amp remote. Nice of Mr Ford to make that confusing ?????

If you're fitting a complete aftermarket system I'd run all new cables to be on the safe side, but if you can get hold of a factory ST subwoofer, I can recommend that very highly - very stealth, and excellent sounds.

If anyone needs the wiring info for connecting the Factory sub to an aftermarket headunit, I'm happy to share my knowledge.[/QUOTE]

 

Amazes me how people don't check the dates on these threads......

 

I'm fully aware about the age of the post, however, who's not to say that the members are still subscribed to this forum, I thought it was worth a try, I do wish you well