HOW-TO: Getting that Stock Audiophile HU to turn on sub amp - Ford Focus Forum, Ford Focus ST Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace

Go Back   Ford Focus Forum, Ford Focus ST Forum > Ford Focus Tech Discussions > Car Audio, SYNC, MyFord Touch & Electronics

Car Audio, SYNC, MyFord Touch & Electronics The Forum for the Ford Focus audiophiles. The place to chat about automobile sound systems, security systems, or show off your I.C.E.!
Sponsored By: GT Sound Control

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 06-17-2007, 03:40 PM   #1
Focus Enthusiast
Join Date: Jan 2007
Fan#: 43024
Location: Michigan, MI
What I Drive: 2013 Yellow ST3

Posts: 183
FF Reputation: 1 joshuass Good Standing Member
Buy-Sell-Trade Rating: (0)
HOW-TO: Getting that Stock Audiophile HU to turn on sub amp

I just installed my new RF Punch P2D4 10" sub and a RF Punch 600.1bd mono amp in my 2007 ST with the sony package to replace that dinky sony sub. It went really well except for one problem...

...the stock HU doesn't have a usable remote on for the amp!

The problem is that the sub turn on signal (a red/white wire) is only 5v, not enough to signal the amp to turn on.

Now, I tried to build an op amp buffer circuit as posted a while back to change that 5v line to 12v but I was not successful. So I came up with a simple fix for anyone that is retaining their HU but wants the amp to turn on and off with the car:

1) Remove the center dash fascia piece as per the directions available from the I.C.E. How-To FAQ.

2) Remove the HU from the console and disconnect all connectors from it.

3) Assuming you do indeed have the Audiophile package, cut the red/white wire from the smaller connector. You should notice that the smaller harness connector is for the sub amp as it contains the gray/black and white/black wires as well as the aluminum foil shielding and bare wire. DO NOT CUT the red/white wire from the larger connector as it is for one of your speakers!

4) Locate the green/yellow wire in the larger harness connect and cut it about 2 inches from the connector. DO NOT cut too close. We need to reconnect this wire down the line!

5) Splice the green/yellow wires back together while attaching the red/white wire to that newly formed junction. This wire is the radio ignition line and it supplies 12v to the radio as an on signal when the car is started or the keys are in the ACC position. When the procedure done, you should have this wire supplying power to both the HU and the sub amp turn-on line (red/white wire).

6) Reassemble the dash and HU

The red/white wire in the trunk should now produce 12v of power when the radio comes on! Verify that it works with a Multimeter.

Comments are welcome!

ST Crew #65
2007 Liquid Gray ST with SAP1
FocusSport CoolFlo Intake, Balance Shaft Delete, TruBendz 2.5" SS w/ Cat, FRPP Performance Springs
joshuass is offline  
    Reply With Quote

Bookmarks & Social Networks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTB: Stock audiophile part Malakai Archive 0 05-05-2007 05:57 PM
Who has changed stock sub in svt audiophile enclosure? R00ST650 Car Audio, SYNC, MyFord Touch & Electronics 0 04-08-2007 10:50 PM
stock amp wiring for svtf svt4chris Car Audio, SYNC, MyFord Touch & Electronics 1 03-28-2005 09:13 AM
audiophile 9006 sub and amp from svt Wailabod Archive 6 12-09-2004 12:37 AM
SVT Audiophile AMP Cutter Archive 2 06-29-2004 08:12 PM

All times are GMT -5. The time now is 05:23 PM.

Copyright 2002-2014 All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.