Converter adjustment instructions: 1, After completing all of the necessary connections, turn the adjustment pots all of the way down by rotating them completely counter-clockwise. 2, Turn the stereo system on and adjust the main volume control on the stereo to approximately 3/4 maximum volume. 3, Select one of the adjustment pots and turn it slowly clockwise until you notice the sound and then stop. 4, Turn the remaining pot to the same position as the previously adjusted pot. Package Included: 1 x wire harness, 1 x Add-A-Circuit fuse tap, 1x 3 amp fuse (show as the picture), Installation Instruction Not Included. Compatible for Ford 2011-2018 Factory Radio This wire harness provides a connection for one set of RCA cables as well as an add-a-circuit with remote wire for the remote amplifier turn on wire. This wire, along with a set of RCA cables, is run to your aftermarket amplifier. All that’s left for you to do is connect the main power wire from your battery (Not included) and ground. Used to add an amp or sub to your factory system. One complete piece, no need to tape wires together. Comes with an inline converter. Fully adjustable gain control. Plug and play feature. Easy to install. Audio volume to the amplifier can be adjusted by the dials on the harness. For easier access we recommend using an external volume knob. It is up to the installer to select which circuit to use with the Add-A-Circuit.