Kleinn 12 Volt Air Compressor Wiring Kit. All the wires, connectors and other parts you need to install a Kleinn air system are at your disposal. The kit includes a 5-pin relay, fuse & fuse holder, wire for the compressor and horn, Kleinn Air Horn Juice to seal air fittings and a variety of wire crimps and connectors. Also included is a color coded wiring diagram for compressor hook up.