One method is to wire the pump to a switched 12-volt source (providing power only when the ignition is on), which is located at the vehicle's electric panel. To assure this condition, the installation of a Holley 12-810 oil pressure safety switch is recommended for installation into the wiring circuit.. 2. Connect the fuel pump (red lead) to a 12-volt ignition source. In this line, add an in-line fuse holder and a 7.5 amp fuse. 3. To complete the installation, connect the ground (black lead) to the battery. Figure 2 WIRING THE FUEL PUMP WITH A RELAY: NOTE: You will need Holley Fuel pump relay kit P/N 12-753 or equivalent 4-wire relay. 1.
![[DIAGRAM] Wiring Diagram Holley Efi](https://i.imgur.com/L1NWSpI.png?1 "[DIAGRAM] Wiring Diagram Holley Efi")
The electric fuel pump in this instruction sheet is of the vane rotor type. Holley makes three versions: a low-pressure pump meets the flow requirements of most passenger vehicles. The high-pressure pump is used mainly for high performance applications and comes with a fuel pressure regulator.. The electric fuel pump in this instruction sheet is of the vane rotor type. Holley makes three versions: a low-pressure pump meets the flow requirements of most passenger vehicles. The high-pressure pump is used mainly for high performance applications and comes with a fuel pressure regulator.