Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software - Manual (Page 13)

BigStuff3 Pro SEFI System (LS1)
Version 1.0 12
Positive and Negative Battery Connections – (Four (4) 3/8” ring terminals. Two (2) red
wire terminals and two (2) black wire terminals)
THE MAIN WIRE HARNESS BATTERY CONNECTIONS NEED TO BE MADE TO
THE POSITIVE AND NEGATIVE POSTS OF THE
VEHICLE BATTERY TO ENSURE
TROUBLE FREE OPERATION! The positive and
negative battery cable lengths have been designed (are long
enough) to accommodate a trunk-mounted battery. Make
sure the two clearly marked black wires battery (-) are
securely fastened to the negative battery post (NO
EXCEPTIONS). The red cable battery (+) must be
securely fastened to the positive (+) battery post.
Making battery connections to locations on the vehicle other than the battery itself can cause the
ECU to function improperly (potential ground loop issues). Connect these wires to the battery
only after all other connections are made.
Back_to_Batt_Connections
Boost (Black 4-way Packard Connector)
Connects to the solenoid(s) valve or PWM boost valve using the provided 4-way connector. See
Boost_Control in Section 60.
Back_to_Boost
LS1 CAM (Black 3-way Packard Connector)
Connect to stock LS1 cam sensor at the back of the
block.
Note: The LS1 Cam, Crank and MAP sensors
use the same 3-way Packard connector,
therefore be sure to connect each of the 3-way
connectors to the appropriate sensor!!
Connector Pin Out ID
A Signal
B Ground
C Switched Ignition
Back_to_Cam