Hardware & BigComm Software User guide

BigStuff3 Pro SEFI System (LS1)
Version 1.0 15
Connect the LS1 Coils Odd connector to the
ignition coil pack connector on the odd fire (1-
3-5-7) bank of the engine. Do the same for the
even fire (2-4-6-8- ) bank of the engine.
Securely fasten the LS1 Coils GND cable to the
engine block or cylinder head!
Back_to_Even_and_Odd_Coil_Connections
Main Fuse & Relay
Back_to_Main_Fuse_Relay
ECU 3-Amp Fuse
This fuse protects the ECU electronics.
Back_to_Veh_Batt_Fuse
Two (2) Thirty (30)-Way ECU Header Connectors
Connect the main wire harness header connectors to
the BigStuff ECU. The two 30-way MWH header
connectors are keyed such that they will only fit in
one of the two ECU mating-half connectors. To
fasten the MWH connectors to the ECU, use a 1/4-
nut driver. Connect the head connectors only after
the battery connections are made. Connect header
connector A through K first, the L through Y.
Return_to_Header_Connectors
WBO2 &
Coil V-Batt
30 Amp fuse
WBO2 & Coil V-Batt Relay