I bought a new radio and put it in my car and made sure all the wires were connected to it. When I start my car the radio doesn't turn on but the red light that shows it has power comes on. When I turn the key as if I was going to start the engine but don't, the radio turns on. My dad and myself think it could be a lose wire that connects from the battery to the radio on the battery side but then how do you explain the red light turning on.