You will need holley fuel pump relay kit pn 12 753 or equivalent 4 wire relay. We have one goal to provide you a one stop solution for all of your wiring components needs.

Power Tap
Holley power tap wiring diagram. This manual contains information and diagrams related to wiring most holley efi products including ecus ignition systems nitrous systems watermethanol injection systems sensors and more. This manual contains all the information needed to install this system. All 0 5v sensors require a 5 volt reference voltage and a sensor ground. Each holley efi connector that has 0 5v inputs has its own 5 volt reference voltage output and sensor ground. Mount relay on firewall of engine compartment using a sheet metal screw. Holley performance products has written this manual for the installation of the pro jection 4d and 4di fuel injection system.
Disconnect the cables from the battery. Wiring the fuel pump with a relay. Please read all the warnings notes and tips as they contain valuable information that can save you time and money. These need to be properly wired to each 0 5v sensor used. Featuring items from multiple holley brands the wiring shop is your one stop place for everything needed to work on your aftermarket fuel injection or high performance ignition system. Whether youre building a harness from scratch replacing an old connector or installing a new sensor holleys wiring shop has the tools and equipment you need.
Before punching or drilling a hole in the firewall make sure you know what is on the other side. We have everything you need to build or service your holley efi powered machine. From connectors and pins to wire loom and tools. Black nylon braided wire loom from 18 to 2 and every connector pinssealstpa included we utilize on our main harnesses are now. 3 11 important wiring dos and donts. Wire the signal output wire from a 0 5v sensor to the appropriate pin using the holley wiring diagram.
Introducing the holley efi wiring shop.