chuyler1 said:Some amps (usually when not using speaker-level inputs) also require a turn-on or remote wire which tells the amp when to turn on. If you have an aftermarket deck there will be an output for this. If you do not have an aftermarket unit you will have to tap into the accessory or ignition wire. I usually just find the fuse for the radio in my fuse box and wrap the wire around it and shove it back in. I know it's not elegant but it works.