Sniper 47 using the power distribution box

The Sniper 47 PDM simplifies wiring by centralizing power, ground, and switched connections for your EFI system, fuel pump, ignition, and optional accessories.OverviewThe Sniper PDM is designed to streamline your Holley Sniper EFI installation by consolidating multiple electrical connections into a single, compact module. It provides power, ground, and switched connections for components such as the throttle body, fuel pump, ignition module, and optional fans, while also offering diagnostic LEDs to alert you if a short is detected .Installation StepsMounting the PDMChoose a location not exposed to direct heat sources, such as away from the exhaust system .Use the supplied mounting hardware to secure the PDM in place.Battery ConnectionsConnect the Battery (+) and Battery (-) wires to the heavy-duty wire lugs on the PDM.Always disconnect the battery negative (-) terminal first and reconnect it last to ensure safety .Ignition and Switched PowerInstall the keyed ignition wire on terminal 16.Connect the CDI Ignition Main Power (+), Main Ground (-), and Switched 12V to their corresponding locations on the PDM .Posts 5 and 14 provide continuous 12V power when connected to the battery, with a slight voltage drop when the switched 12V is off to reduce battery drain .Accessory ConnectionsThe PDM can distribute power to the Holley EFI fuel pump and a single fan, with an option for a second fan.Two additional 2-amp circuits are available for low-current accessories like gauges or trigger relays .Follow the diagram on the PDM lid for proper input and output connections .Tach and Coil WiringThe yellow wire from the negative side of the coil provides the tach signal to the Sniper handheld.For external coils, ensure both the 12V side of the coil and the distributor receive power. You can jumper the 12V coil power to the distributor power wire if needed .Tips and RecommendationsUse a trickle charger if the car sits for extended periods, as the PDM draws less than 100 mA when connected to the battery .The PDM's diagnostic LEDs help identify shorts or faults during installation.Stripped wire ends are simply slid under the correct terminal and secured with the set screw, eliminating the need for complex soldering or heat-shrink connections . By following these steps, the Sniper 47 PDM will clean up your wiring, provide reliable power distribution, and simplify future maintenance or modifications to your EFI system .