Pin
Number |
Pin
Name |
Wire color* |
Description |
1 |
A1 |
|
SCV - speed-dependent volume control. This pin is used in some radio equipment to automatically boost up the volume. It needs the output from the speed sensor. Note: If the speedometer stops working when the radio is connected, then the pin is probably grounded because radio probably uses this pin for another function, except for GALA. On some equipment this pin is used, instead, for the rear-view camera control input, which carries the 12v backup-light signal to the head unit to tell it to display video from the backup camera. |
2 |
A2 |
|
Mute from Cell-Phone. This pin is used to silence the audio cd, earthed by some other external components such as a mobile phone that is connected to the radio. |
3 |
A3 |
|
the reversing light switch. Satellite navigation uses this signal, the GALA signal (pin 1) and an internal laser gyroscope to calculate position in the absence of satellite signals. +12 V input on the radio with the ignition switched on the ignition and the car is in gear to move backwards. |
4 |
A4 |
YELLOW |
Memory Power (12V direct from Battery). Connects the radio directly to the battery. |
5 |
A5 |
BLUE |
Power for Electric Antenna. Output from the stereo +12 V (maximum 150 - 300mA) power supply for automatic or electronic antennas. |
6 |
A6 |
ORANGE/WHITE |
Dial-light illumination (car side light circuit). +12 V input on the car when the lights are on. For some it actually illuminates the radio display - the others can dim the lights. If the dashboard of your car has a light control function, this pin should be connected in order to regulate the brightness. The wire from lighting a cigarette lighter can be used for the same purposes. |
7 |
A7 |
RED |
+12V Main Power (Switched via Ignition key). +12 V with the ignition key is in the ACC or ON position. |
8 |
A8 |
BLACK |
Ground (Chassis) |