Head unit pinout abbreviations
Pin Notation |
Pin function |
---|---|
Power pins |
|
Bup | Battery+ (12V direct from Battery). |
GND, GROUND | Chassis Ground |
ACC | Ignition powered. +12 V with the ignition key is in the ACC or ON position. |
ILM | Light-on signal or backlight adjustment. +12V supplied to light-on pin of head unit when tail lights ar turned on. May be used for backlight adjustment in some models. |
Audio pins |
|
FR+ or RF+ | Front right speaker out |
FL+ or LF+ | Front left speaker out |
RR+ | Rear right speaker out |
LR+ or RL+ | Rear left speaker out |
FR- or RF-, FL- or LF-, RR-, LR- or RL-, SGND | The corresponding speaker ground |
Misc. pins |
|
MUTE | This pin is used to silence the audio, earthed by some other external components that is connected to the radio. |