Altima front speaker wire colors

[Bennyc767]

Hey everybody, i'm in the process of installing new front speakers in my '98 Altima and i can't find a wiring diagram to decode the polarity of the speaker wires anywhere. Any help would be greatly appreciated.

Thanks,Ben

[Notorious170]

the speaker wire colors are green, purple, grey, and white. i dont remember which are the fronts/rear, but i know the wire with the stripe is the negative.