So the 12 volt ignition power wire is what the radio uses to tell it that the vehicle is on and to turn on the radio or "wake up" this can be wired to say power source that powers the radio if you like.
So on the new stereo the names of these circuits are slightly different but basically you'd run the dc switched circuit and the power input dc 10 amp circuits together and to same wires that your old stereo ran to that were together. The third wire that says amp remote would be if you... view full answer...