Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software - Manual (Page 28)

Switched 12V Source in the Vehicle
Foot brake Switch or
Trans-brake Button
(12V applied to this
wire when foot or
trans-brake button is
depressed)
Brake Lights
or Trans-
brake
BigStuff3 - Data Log Trigger/Timer Enable/Starting Line Timing - Wiring Diagram
Off Foot, Trans-brake or Dual State Clutch Switch – No BS3 2-Step
C D B
Boost Connector from Main
Wire Harness
A
Relay
86
30
85
87
87a
Data Trigger/Timer Enable Wire
Ground
Dash Mounted
ON/OFF Switch
(required) to turn
the “ Data Log
Trigger On and
Off.
With Clutch IN –
12V is supplied to
the optional
systems wire
With Clutch OUT
– 12V is supplied
to the Timer
Enable wire
Dual State
Clutch Switch
OR
Timer Enable input Wire if Clutch Switch is Used
GEN3 ECU Header 1 - Terminals A - K
Row 1
Row 2
Row 3
A B C D E F G H J K