Rear Right and Rear Left (-) are at pin 20?
Head unit pinout signals explained
|Battery+ (12V direct from Battery).
|Ignition powered. +12 V with the ignition key is in the ACC or ON position.
|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.
|Power for Electric Antenna. Output +12 V (maximum 150 - 300mA)
|FR+ or RF+
|Front right speaker out
|FL+ or LF+
|Front left speaker out
|Rear right speaker out
|Rear left speaker out
|FR- or RF-, FL- or LF-, RR-, LR- or RL-, SGND
|The corresponding speaker ground
|This pin is used to silence the audio, earthed by some other external components that is connected to the radio.
Toyota CDX-M9406 ZT