Im looking at an aftermarket radio. I have wired many aftermarket radios but have run into some wires I have no experience with. If someone could please explain the wires in red below I'd be grateful.


24 PIN WIRE COLORS / FUNCTIONS:


TOP ROW


YELLOW 12V. CONSTANT
RED 12V. ACCESSORY
ORANGE / WHITE STRIPE (+) ILLUMINATION
ORANGE / BLACK STRIPE (-) ILLUMINATION
BLUE / RED STRIPE PAEN (US), AUD. SYSON (MAZDA)
BLACK / GREEN STRIPE GROUND (MAURADER), CLOCK (OTHERS)
BLACK / YELLOW STRIPE PTA (EXPEDITION)
WHITE LEFT FRONT SPEAKER (+)
GREEN LEFT REAR SPEAKER (+)
PURPLE RIGHT REAR SPEAKER (+)
GRAY RIGHT FRONT SPEAKER (+)
GRAY / BLACK STRIPE RIGHT FRONT SPEAKER (-)


BOTTOM ROW


BLACK GROUND
GRAY / RED STRIPE VSS (+)
RED / WHITE STRIPE 12V. IN START
YELLOW / ORANGE STRIPE NO FUNCTION
YELLOW / BLUE STRIPE NO FUNCTION
GREEN / RED STRIPE STEERING WHEEL CONTROL (+)
GREEN / WHITE STRIPE STEERING WHEEL CONTROL (-) (EXPEDITION)
BROWN / RED STRIPE REAR PARKING AID (EXPEDITION)
WHITE / BLACK STRIPE LEFT FRONT SPEAKER (-)
GREEN / BLACK STRIPE LEFT REAR SPEAKER (-)
PURPLE / BLACK STRIPE RIGHT REAR SPEAKER (-)
BLACK / GRAY STRIPE GROUND Why 2 grounds?




16 PIN WIRE COLORS / FUNCTIONS: I realize these will not be used as the radio does not support DVD or Satellite Radio
but I'm still curious what they do.
TOP ROW


TAN DVD SIGNAL LEFT (+)
LIGHT BLUE DVD SIGNAL LEFT (-)
GREEN / BLACK STRIPE SHIELD
BLACK NO FUNCTION
WHITE NO FUNCTION
BLACK AUDIO SYSTEM ON
GRAY / RED STRIPE AUDIO CORP. PROTOCOL A
VIOLET / BLACK STRIPE AUDIO CORP. PROTOCOL B




BOTTOM ROW


PINK DVD SIGNAL RIGHT (+)
GRAY / WHITE STRIPE DVD SIGNAL RIGHT (-)
GREEN / ORANGE STRIPE NO FUNCTION
BLACK NO FUNCTION
BROWN / RED STRIPE NO FUNCTION
BLUE / RED STRIPE NO FUNCTION
ORANGE / BLACK STRIPE NO FUNCTION
GRAY NO FUNCTION




8 PIN WIRE COLORS / FUNCTIONS: This will have to be hooked up to RCA cables or cable


TOP ROW


RED / YELLOW STRIPE SUBWOOFER (+)
BLACK SUBWOOFER (-)
BLACK SHIELD
RED SUBWOOFER MUTE Would this be hooked up to anything on an aftermarket?




BOTTOM ROW


RED / YELLOW STRIPE NO FUNCTION
BLACK NO FUNCTION
BLACK NO FUNCTION
RED NO FUNCTION


Last why is there no amp trigger wire? What would the amp trigger wire from the aftermarket be hooked to?

 

I may have figured this one out. Our amp uses the signal from the amp speaker signal as a trigger? Right?

 

The amp trigger wire will come off the back of the aftermarket unit, usually blue with white stripe.

Go to Best Buy and buy the wire harness adapter designed for aftermarket to stock systems. Plugs into factory harness, no hacking wires up, and the instructions will tell you which wire do what.

 

I bought the harness with the radio. It did not show any trigger wires on it. I checked on another sight and it does have the trigger wires so I got that figured out. Only thing left is the steering wheel controls.....