udmm54 10+ year member
Junior Member
My metra harness is missing A03 and A04. are these usually not needed? thanks. btw this is a reverse harness going into the factory radio
A01: Yellow/Green: Radio Switch
A02: Yellow/Red: ACC (Main stereo power supply)
A03: Green/Red: Radio Remote Switch
A04: Red/White: (Security Input)
A05: Pink: Right Rear Speaker +
A06: Blue/White: Left Rear Speaker +
A07: Green/Yellow: Front Passenger's Door Speaker +, Right Tweeter +
A08: Green/Black: Driver Door Speaker +, Left Tweeter +
A09: Red/Black: Lights-on Signal
A10: White/Green: Constant Power
A11: Brown: Radio Remote Switch Ground
A12: Not Used
A13: Not Used
A14: Not Used
A15: Blue/Yellow: Right Rear Speaker -
A16: Blue/Black: Left Rear Speaker -
A17: Gray: Front Passenger Door Speaker -, Right Tweeter -
A18: Light Green: Driver Door Speaker -, Left Tweeter -
A19: Red: Dash Lights Brightness Controller
A20: Black: Ground
A01: Yellow/Green: Radio Switch
A02: Yellow/Red: ACC (Main stereo power supply)
A03: Green/Red: Radio Remote Switch
A04: Red/White: (Security Input)
A05: Pink: Right Rear Speaker +
A06: Blue/White: Left Rear Speaker +
A07: Green/Yellow: Front Passenger's Door Speaker +, Right Tweeter +
A08: Green/Black: Driver Door Speaker +, Left Tweeter +
A09: Red/Black: Lights-on Signal
A10: White/Green: Constant Power
A11: Brown: Radio Remote Switch Ground
A12: Not Used
A13: Not Used
A14: Not Used
A15: Blue/Yellow: Right Rear Speaker -
A16: Blue/Black: Left Rear Speaker -
A17: Gray: Front Passenger Door Speaker -, Right Tweeter -
A18: Light Green: Driver Door Speaker -, Left Tweeter -
A19: Red: Dash Lights Brightness Controller
A20: Black: Ground