I am trying to install a 2000 Montana van radio into my 88 Fiero. I finally located two harness adapters that will connect the two. The old plug was left in the radio with cut off wires. (Too short to use) The problem is, the wire colors don't match the ones in the new plug, and after hours of searching, I have not found a wiring diagram that matches the original either. This is a 24 pin connecter with 4 positions not used. Does anyone know which colors or positions are for which functions? Speaker connections are pretty obvious. Thanks for any help.
2000 Pontiac Montana Car Audio Wiring Diagram Car Radio Battery Constant 12v+ Wire: Orange Car Radio Accessory Switched 12v+ Wire: Yellow Car Radio Ground Wire: Black Car Radio Illumination Wire: Gray Car Stereo Dimmer Wire: Brown Car Stereo Antenna Trigger Wire: N/A Car Stereo Amp Trigger Wire: N/A Car Stereo Amplifier Location: N/A Car Audio Front Speakers Size: 5 1/4″ Speakers Car Audio Front Speakers Location: Dash Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front Speaker Negative Wire (-): Dark Green Car Audio Rear Speakers Size: 5 1/4″ Speakers Car Audio Rear Speakers Location: Rear Hatch Left Rear Speaker Positive Wire (+): Brown Left Rear Speaker Negative Wire (-): Yellow Right Rear Speaker Positive Wire (+): Dark Blue Right Rear Speaker Negative Wire (-): Light Blue
Thanks. Problem is, I have only one gray wire, two orange wires, a pink, brown/white, two black/white, one yellow, and one gray/black. Must be some alternate colors. The speaker wires appear to be the same. Thanks.