2003 Vibe GT radio harness

[dannyy72]

I did some research on installing an aftermarket radio and took the stock radio out to have a look at the back. I have almost all the wires figured out on the 24 pin plug, but there's one plug that has 1 wire coming out and I have no idea what that's for. Any ideas? I've read somewhere that it's for turning on the factory amp, can anyone confirm that?

[joatmon]

That is the general consensus here. The wiring diagram calls the radio output "Mute" but in a Vibe with the Moon&Tunes, I think it acts as a external amp enable

There's a pic of the Moon &Tunes pinout, it's here elsewhere somewhere, but the link eludes me, so I attached it again here. Shows the white wire you asked about as the only thing on radio connector "C2"

[dannyy72]

Thanks for the info. So what does it do exactly?