Folks,

I realize I am committing a cardinal forum sin of bumping an ancient thread, but my searches for a Fiesta T-harness lead me to y'all. I have a 2017 Fiesta with the Sony system. However, our ACM appears identical to yours, shown in Post 122. Currently, nobody makes a T-harness for the Fiesta with the Sony system, however, everyone I have asked - PAC and Metra - both say they haven't tested their harnesses yet, so they don't know for sure. It looks like a user with a Focus chimed in earlier with the same issue, again with an identical ACM plug.

As far as I can tell, the "amplified" Sony system does not actually have an amplifier anywhere. It was available as a factory option in Fiesta Titanium SEDANS with the factory Sony audio system, but I have stripped out the entire interior of this car more than once and did not see anything resembling an amplifier at any time. The factory service manual also makes no mention of one, and FORScan does not show an amplifier.

I don't expect anyone here to know the ins and outs of the Fiesta's audio system, but I am willing to try a few things before I cut into my factory wiring harness. It appears that y'all have been using the Parrot (or other) FOR-11CK as a T-Harness for the speakers between the factory 24-pin harness due to it having the correct pins. Is this still what y'all are doing?

If so, do y'all happen to have a pin-out diagram? In the Fiesta, the pins are as follows. Given that we're all using each others' harnesses, I assume they are the same, but I want to make sure.

1. Battery
2. Antenna
3. Starting/Charging System
4. x
5. x
6. x
7. x
8. x
9. Left Rear -
10. Left Front -
11. Right Front -
12. Right Rear -
13. Ground
14. CANBus +
15. CANBus -
16. x
17. x
18. x
19. x
20. x
21. Left Rear +
22. Left Front +
23. Right Front +
24. Right Rear -

Is that what y'all have, too? If so, I'll order myself a FOR-11CK and save myself the trouble. Apologies if I missed it, I did try to read the whole thread.

Much appreciated!

 

F150's have the Sony amp under the console. If you have an amp then you will need to completely bypass it. If not and just Sony branded speakers then you can use a FOR-11CK. I would get the pin outs for an F150 and compare it to the Fiesta's

 

Thanks, yeah. It is certainly POSSIBLE that there exists an amplifier somewhere in the dashboard or something, but if so, the factory service manual makes no mention of it and nobody has ever found it when taking the car apart or posting build threads for their own systems, so I am inclined to think that there is no amplifier.

I've compared the pinouts for the 2013 F150, but the pinouts changed on the Fiesta depending on - and I am not joking - if you have the non-amplified non-Sony radio, the non-amplified Sony radio, the amplified Sony radio, if you are in the US or elsewhere in the world, if you have the three-door or the five-door, and they also changed from 2013-2015, 2016-2017, and 2018-2019. Which is to say that there exists somewhere a specific diagram for a 2017 Fiesta ST five-door hatchback in the US, but that any pinout diagrams on the internet could be any of those 36 variations.

I'm going to crack mine open again soon and see which pins are where. It looks like the 2013 F150 and the 2017 Fiesta have the same number of wires, but in slightly different pins. The speakers are the same in pins 9-12 and 21-24, but the location of the wires for other things like CANbus Signal and Antenna are in different pins.

My thinking is that I could get the Metra kits or the FOR-11CK and, if any pins are mismatched - ie, the harness has a wire in Pin 15 where my car has a wire in pin 14 - I can just swap that over. I imagine the car doesn't care as long as the proper pins are getting signal.

 

you’re welcome
https://lemon-manuals.la/

 

Holy smokes. I have NEVER been able to find the 2017 ST-specific manual, the one circulating online for as long as I've had the car has been from 2014. This is a game-changer. Thank you so much. I also feel good about the fact that no amplifier is mentioned here, either.

It looks like my read of the pins is correct, but my assumption is also that it doesn't really matter what the pins do, per se, as long as everything matches - ie, as long as a wire from pin 4 is still going to pin 4, that's all that matters, right?

 

Would this herness work with what you are doing?

LPHFD21 – PAC-Audio

 

I would have thought so, but I wrote to Stinger and they said they hadn't tested it and I didn't want to gamble $100 to find out.

Ultimately, the Metra harnesses in the original post worked. The 70-5524 has one pin in a different location from the factory harness - I think pin 6 to pin 3 - so I just had to move that, solder them together, then run the speaker wires through the car to the inputs and outputs of the amplifier. Incredibly time consuming and difficult but ultimately pretty simple.

I imagine the F-150 is a fairly intuitive car to work on being for the American market, but as the Fiesta was designed by Ford of Europe and designed as an RHD car there are tons of baffling design decisions and quirks that made this a 12+ hour job, most of which was just fighting with stupid **** inside the car, trying to get little plastic clips properly aligned, realizing at the last minute that a single 14mm bolt was load-bearing, etc.

Anyway, thanks to OP and everyone else for all the troubleshooting on this, I never would have figured any of this out if I hadn't stumbled onto this thread. I've now got a Key200.4 and a powered subwoofer wired up in the car and it looks totally stock inside.

 

Next time ask HUSH to built you a harness. It is a lot easier