Pinouts >  Genuine Ford Car Stereo harness
12 pin Ford CD Changer connector layout
12 pin Ford CD Changer connector
may be used to connect CD Changer or MP3 adapter. Connector is placed on the rear side of genuine stereo head unit.

Pin Function
1 ACP+
2 ACP GND
3 GND
5 R+
6 L+
7 ACP
8 CD Enable
10 Audio GND
11 R-
12 R-

The CD Enable line is 0V when the radio is off and +10V when it is on

Head unit pinout abbreviations meaning

Pin
Notation
Pin function

Audio pins

R+  right speaker out
L+ left speaker out
R-,L-  The corresponding speaker ground
ACP Audio Control Protocol

Ford ACP is a network protocol used by the Head Unit to communicate and control audio devices such as the Ford 6 disc CD Changer or Ford Telematics units. It is based on RS485 with 9 bit character data at 9600 baud. A MAX-481 low power RS485 transceiver will work as interface between a serial USART and ACP bus.

 

According to 2 reports in our database (2 positive and 0 negative) the Ford (1990-2004) CD/MP3 Changer pinout should be correct.

Is this pinout
Ford (1990-2004) CD/MP3 Changer visual pinout:click to enlarge
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