No it isn't the power wire for your amp. Check all the lines that your radio harness is hooked into because thats where your problem is coming from. Possibly the remote turn on wire. What I would do is unhook the wire that is the orange wire for your radio (the illumination wire) and check all other wires. I am assuming you have an aftermarket head unit. See if when you remove the illumination wire from the circuit and secure the remote wire if you still have the same problem.