No power to radio igition wire. Radio not powering on. Anyone know how to fix this?

ok i think you might be confused if the car is off then the wire that lights up is the constant the ignition is the wire that turns on when the key is turn the ground is the one thats not going to turn on at all usually black or brown but in anycase if your open to getting an aftermarket i say go for it its always better but make sure you get a wiring harness so that you make it easier when installing the wires