|backup||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.|
|ILL||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.|
|ANT||Power for Electric Antenna. Output +12 V (maximum 150 - 300mA)|
|Rch+||right speaker out|
|LCh+||left speaker out|
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