What three wires ? Power, ground , and remote ?
Power goes to a twelve power source. preferably the battery.
Ground to a paint, and rust free metal spot.
Remote if nothing else to a acc. lead in the fuse panel that only gets power when the ignition is turned on. Or you could simply wire a switch in place. And run a 12v source to the switch, and then to the amp. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif