Main fuse & relay, Ecu 3-amp fuse, Two (2) thirty (30)-way ecu header connectors – Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software User Manual
Page 16: Main_fuse_and_relay, Vehicle_battery_fuse, Header_connector
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
ECU 3-Amp Fuse
This fuse protects the ECU electronics.
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.
WBO2 &
Coil V-Batt
30 Amp fuse
WBO2 & Coil V-Batt Relay