Our Switch Harness for ARB Twin Compressors is an ideal harness for your air compressor if you are utilizing a switch mounted right next to the compressor but do not want to run power to the switch separately. Our Switch Harness plugs directly into the ARB harness on the compressor and provides power to the switch along with a trigger wire. Simply plug the Switch Harness into the compressor, connect the 3 leads to the back of your ARB Switch and you can turn the compressor on/off. The switch also lights up as well when activated. Plug & Play!