The Power Distribution Module (PDM) is a cost-effective and optional accessory that isolates the core of your EFI and ignition wiring into one, easy to use location. Simply slide the stripped wire ends under the positive lock connector and tighten down the set screw. It also distributes power to your EFI fuel pump and a single fan (second fan can be ground triggered through the included input/output harness). Two additional 2-amp circuits can power low current accessories like gauges or to trigger relays. Battery and a switched 12 volt source are all that's required from your vehicle to power the PDM.