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Old 04-09-2007, 05:30 PM   #1
Tim
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Member No.: 1
Join Date: Mar 2007
Location: Lewisville, TX
Posts: 13,071

Vehicle Info:
Ride:2003 Mustang GT Vert
Nickname:Rattletrap
Transmission:4R70W
Induction:ATI P1SC

iTrader Rating: (9)
Lightbulb How to install an aftermarket deck while using the stock Mach 460 Amps & Speakers

EDIT: This is a write-up I wrote a long time ago and have since lost a couple of original screen shots that I made. I will try and find them and add them to complete the write-up. I have added the screen shot of the adapter and voltage regulator wiring diagram.

*Click here to see the exact Scosche Factory System Integration Adapter that I purchased for this project.

*The aftermarket cd/radio I am using this adapter with is a Sony CDX-MP40 MP3 deck.


How to install an aftermarket deck while utilizing the stock Mach 460 Amps & Speakers. This install took me about 1 hour start to finish. If you take your time and do it right it's not that difficult at all.

Note: This install may not work at all on '03 - '04 models due to a change in the deck and amp interface. 2003 & up models may need a FDK9 car stereo wiring harness.

#1 - You will need a SCOSCHE OEA-4 FACTORY AMP INTERFACE ADAPTER w/OEA-4 HARNESS. A SCOSCHE FAI-3A will also work in most cases.

#2 - You will need a 5 Volt Fixed Voltage Regulator (Radio Shack #276-1770) to eliminate amplifier pop when you turn the system on. You will install this between the deck and the scosche adapter on the Amp REM Wire (Amp Remote Turn-on wire it's usually blue or blue/white - some brands may vary) Why: Because the Ford Mach deck in most cases uses a 5V amp signaling voltage to turn on the amps and most the aftermarket decks use a 12V amp signaling voltage and that will cause that annoying pop when you turn on the deck.

#3 - You will need to properly adjust the output level gain controls after the install to get it to sound right. This is an important step, so take your time and do it right. Note: There will not be a great deal of room to work with inside that dash recess after installing the scosche adapter+deck. So, becareful and don't just force it back when mounting the deck+adapter.

#4 - I have included 3 screen shots to better facilitate the installation process.

1st screen shot is a wiring illustration. (still trying to find my original screen shot)

2nd screen shot is a how to adjust the output level & wire color code chart. (still trying to find my original screen shot)

3rd screenshot is a wiring how to for the voltage regulator.

Mustang aftermarket deck installation using Mach 460 amps and  speakers scosche amp interface adapter

Mustang aftermarket deck installation using Mach 460 amps and speakers fixed volt regulator wiring diagram

Mustang aftermarket deck installation using Mach 460 amps and  speakers fixed volt regulator

Mustang aftermarket deck installation using Mach 460 amps and  speakers final deck installation

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Last edited by Tim : 01-27-2014 at 08:36 PM.
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