2012 Scion iQ Car Stereo Wiring Diagram
Car Radio Battery Constant 12V+ Wire: Blue
Car Radio Accessory Switched 12V+ Wire: Gray
Car Radio Ground Wire: White/Black
Car Radio Illumination Wire: Green
Car Radio Dimmer Wire: Green
Car Radio Antenna Trigger Wire: Black
Car Radio Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A

Car Audio Front Tweeter Size: 1″ Tweeters
Car Audio Front Tweeter Depth: 1″
Car Audio Front Tweeter Location: N/A
Left Front Speaker Positive Wire (+): Pink
Left Front Speaker Negative Wire (-): Violet
Right Front Speaker Positive Wire (+): Gray
Right Front Speaker Negative Wire (-): Yellow

Car Audio Front Speakers Size: 6 1/2″ Speakers
Car Audio Front Speakers Depth: 3 1/2″
Car Audio Front Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Red
Right Rear Speaker Negative Wire (-): White

Car Audio Rear Speakers Size: 5 1/4″ Speakers
Car Audio Rear Speakers Depth: 3 1/2″
Car Audio Rear Speakers Location: N/A

Car Subwoofer Speaker Positive Wire (+): N/A
Car Subwoofer Speaker Negative Wire (-): N/A
Car Subwoofer Speaker Size: N/A
Car Subwoofer Speaker Depth: N/A
Car Subwoofer Speaker Location: N/A