Fuel_pump – Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software User Manual
Page 12
BigStuff3 Pro SEFI System
Version 2.1 – February 2011
12
Primary Fuel Pump (LS) – (Single lead Packard connector with a single black/white wire).
This
is the PRIMARY pump connection. If only one fuel pump is being used, it must be wired to this
low side connection!
This connector must go to the negative side of a fuel pump relay, not directly to the fuel pump.
Terminating this connection directly to a fuel pump
will damage the Big Stuff controller and will
void the warranty!
The primary fan wire is red with a white stripe, but the connector is identical to
the fuel pump connector(s); so make sure to read the wire label to ensure the connector is terminated
correctly. Wire the primary (low side) fuel pump relay per the diagram below.
This diagram is also available on the Bigstuff3 website via this link:
. The fuel pump relay is
not supplied with the system. A standard 40 Amp, four post relay, available at most part stores, will
work.
Secondary Fuel Pump (HS) – (Single lead Packard connector with a single red and white striped
wire).
This is the SECONDARY pump connection. If only one fuel pump is being used, it must
be the Primary Fuel Pump (LS) shown above!
The secondary fuel pump turns on as a function of
throttle position and is configurable!
This connector must go to the positive side of a fuel pump relay, not directly to the fuel pump.
Terminating this connection directly to a fuel pump
will damage the Big Stuff controller and will
void the warranty!
The fan connector is identical to the fuel pump connector(s); so make sure to read
the wire label to ensure the connector is terminated correctly.
Wire the secondary (high side) fuel pump relay per the diagram below. This diagram is also available
on the Bigstuff3 website via this link:
. The fuel pump relay is
not supplied with the system. A standard 40 Amp, four post relay, available at most part stores will
work.