i have a 1994 geo prizm, i'm taking out the stock stereo and installing my alpine, where can i find out what color wire on stock harness? i don't want to go buy an adapter.

I Belive:
Black=neg
Red=pos
Yellow=key on/acc

as for the speaker wires I'm really not sure, I found mine by trial and error. Good luck

i did it an all i got to say is i wish i bought the 6 buck adapter

Personally, I wish I would have known there was one made for the car. I would have bought one.

yes they do have the adapter at walmart an advanceauto