you can contact a sound performance shop and tell them the brand of radio you installing and model vehicle your installing it in and for about $10 they will sell you a color coated harness that plugs into your radio, you just cut wire and splice same color wires together from your car harness to the radio harness you purchased and plug in to radio. and whala done. hope this helps you.
Argh. No don't do that. I talked to a local shop and then called Crutchfield and found out the local guys had no clue what they were talking about. Anyways, you can't just use an adapter. Too much voltage will go to the amps and burn them out. Call Crutchfield and talk to them. They can sell you a harness that can lower the amount of voltage going to the amps so you won't burn them out.
Argh. No don't do that. I talked to a local shop and then called Crutchfield and found out the local guys had no clue what they were talking about. Anyways, you can't just use an adapter. Too much voltage will go to the amps and burn them out. Call Crutchfield and talk to them. They can sell you a harness that can lower the amount of voltage going to the amps so you won't burn them out.
oh yeah, I had little to no volume control when I first put my rockford fosgate head unit in. I've been trying to find that voltage turn down and now I know where to look. I'm really thinking about buying some nice speakers and just taking out the amps.
i put mine in with a metra harness, it used the rca's to connect to the factory speaker wires, and works great and the harness was only 20 bucks go to the audio section here i put up the number i used there in an older post.