Holley Sniper Fuel Pump Wiring

[FF33rod]

Don't want to confuse the situation here but keep in mind the following
- Holley supplies a harness with a relay for the fuel pump. This relay supplies a switched 12V for the fuel pump on a thick blue wire
- the output from the Sniper that controls that relay is also a blue wire but smaller diameter. This signal wire direct from the Sniper controls the ground side of their fuel pump relay in their harness
- so you can use either a low current ground output direct from the Sniper to control the RF relay or use a heavy current capable 12V to either power the RF relay or go direct to the pump

So if you eliminate the relay in the Holley wire harness and want to use the Sniper signal to activate the fuel pump relay as part of the RF fuse panel, then it needs to go to the ground side of the relay coil (not that 12V side which is the brown wire that is referred to cutting in the manual)

If you keep the Holley relay in the wire harness then you can use that relay's output (heavy blue wire) to activate the RF relay by cutting and connecting it to the brown wire as described in the manual OR you can run the heavy blue wire all the way back to the fuel pump directly (it's long enough) OR you can cut the heavy blue wire short and connect it to the tan fuel pump wire in the RF harness (this bypasses the RF relay).

Inertia Switch: It's currently wired to the ground side of the RF fuel pump relay. If the switch is tripped, it's open and no ground is available. It seems it's intended for low currents so keep it on the control side of the relays not the high current that drives the pump. It can control either the ground or 12V side - in between either of those and the respective control connection on the relay. So in the case where the signal wire from the Sniper is used to control the RF relay, I replaced the ground connection that goes to the inertia switch with the Sniper control signal. That way you only have to cut/connect one side of the inertia switch differently. In the case where you use the Holley relay to drive the RF relay, you don't have to do a thing (the inertia switch is already controlling the ground to the RF relay). In the case where you drive the fuel pump direct with the Holley relay output, you have to figure out something else.

Hope that helps
Steve