Hello, sorry to bring this up again.
I just bougth a 2005 Element, the radio was not working so when i removed i saw there was no connected, there is not even a connector anymore, someone cut if off, so i buy an aftermarket stereo and look a diagram on internet, i connected all wires correctly, however i cant find a way to turn the amplifier so there is no sound. My aftermarket stereo only have one remaining wire, the blue wire antenna, i connected that to the A1 Yellow Green wire but there is no response, is there any way i can get the amplifier power up somehow when i turn on the key switch?