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Start / Stop Eliminators, 30 Minute Max Idle Eliminators, and programmers.

Subwoofer Low Level Programmer & Harness for SYNC 2 & 3 (8'' Screen)

Ford

Watch the installationSee the steps before you buy.
$59.99 - $149.99
(4 reviews)
Shipping:
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Warranty:
One year from date of purchase (click for details)
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WATCH BEFORE YOU BUY

See how it works.

Check the guide’s vehicle and model-year details before installation.

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Product details

FEATURES:
 
  • Enable the subwoofer 4 volt, line level, pre-out perfect for use with an aftermarket subwoofer amplifier.
  • Simple DIY vehicle programming
  • Maintains factory & extended warranties
  • Non-refundable once used
  • Single vehicle use - locks to first vehicle
  • Guaranteed to work on compatible vehicles below 

NOTES: The harness allows you to easily connect your amplifier to to the factory wiring. The harness provides two mono RCA connections for the low level input to the amplifier. There is no low-pass filter built into the radio, you will need to use the low-pass filter on the subwoofer amplifier.

COMPATIBILITY:

  • 2015-2020 F-150 w/ Sat Radio
  • 2017-2019 Super Duty w/ Sat Radio
  • 2015-2022 Mustang w/ Sat Radio
  • Will NOT work Sony, THX or B&O premium audio systems.

  sync-1-no-5x3.jpgsync-2-yes-5x3.jpgsync-3-yes-5x3.jpg

INSTALLATION:
  • Simply insert into the diagnostic port below the steering wheel.

sse-installed-front-watermarked.jpg 

 

 Owners Manual Icon Installation Manual Icon

Warranty information

One year from date of purchase
Write a Review

4 Reviews Hide Reviews Show Reviews

  • 5
    Great Quality

    Posted by Cory Welsh on Jun 3rd 2026

    The harness is an OEM quality part. Connects right into the system plug and play… the OBD2 device updates for the low level and I am getting a clear audio to my amp… it’s full range, and there is no “sub control” on the head unit so make sure your amp has a good crossover. I am using the JL Audio RD900/5 amp. And I have the amp set to DC Offset sensing. Works amazing. So clear and so loud. But with any amp, it’s garbage in garbage out. And this is definitely not garbage in.

  • 4
    Low level sub harness and programmer

    Posted by Larry Freer on Feb 13th 2021

    Had a little trouble at first, got the red code, but emailed support and they me disconnect the supplied "pigtail" and it worked like a charm. Everyone told me it was impossible to install a sub in my '13 Explorer without an expensive data module. This is a way easier and cheaper solution!

  • 5
    wiring harness

    Posted by eli eakes on Dec 31st 2020

    great product. even with covid it came in quickly

  • 5
    Sub installation harness

    Posted by Nelson on Nov 13th 2020

    The harness install was straightforward...even easy if you are already familiar with removing the sync faceplate and trim. There is plenty of room behind the ACM for the harness and RCA cabling. The crux of the install, as it usually is, was getting power through the firewall to the new rear amp. 4Techs harness makes the in-dash wiring, by contrast, a snap and eliminates the need to do messy vampire taps on speaker lines. If youre adding a sub get this part! It will save you time, headache and help your install be neat and clean.