Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software - Manual (Page 10)

BigStuff3 Pro SEFI System (LS1)
Version 1.0 9
Harness
Label
Wire
Color/Connector
Type
Label
Definition
Connect To Further Details
LS1 Coils
Ground
Black 3/8 ring
terminal
Ground cable
for LS1 Coil
packs
Engine block or
equally adequate
ground location LS1_Odd_and_Even_Coi
l_Connections
Wide Band
O2 Black 6-way
connector with gray
locking mechanism N/A Connects to the
Wide band O2
sensor. See photo and further
details.
Wide_Band_O2
Main Fuse &
Relay
N/A N/A N/A
Main_Fuse_and_Relay
Vehicle
Battery Fuse
N/A N/A N/A
Vehicle_Battery_Fuse
Header
Connector
N/A
No label, see
link to photo
in “Further
Details”
Column BigStuff Engine
Control Unit
(ECU) Header_Connector
The paragraphs below further support the information outlined in the table above.
Calport [(software calibration cable interface connector) – (3-way Black Packard
Connector)]
Do not connect the communications cable until all the hardware and
software is installed. See the BigComm Users Instruction Manual
for further information.
Back_to_Calport
2-Step Trigger (Yellow wire)
Connect this wire to the clutch or trans brake switch. If 12Volts are applied to this wire and the
2-Step RPM criteria are met the ECU will maintain the
engine RPM to the 2-Step limit. For more information on
configuring the 2-Step function go to
Back_to_Two_Step_Trigger
3-way, black
Packard connector
AMP RS-232
connector
Communications Cable
(supplied)