Precision Turbo and Engine BigStuff3 GEN3 1st Gear Spark Retard with Traction Control System (SR2) - Manual (Page 5)

Rev 1.0 5
ON/OFF Switch - The SR2
1
st
Gear Retard Control
System requires an in-line
On/Off switch to turn the
“Timer Enable” signal wire
On and Off. This switch is
not required with the BS3
ETM traction control
system
Data Trigger Wire, Hdr. 2, Y2
Starting Line Timing (or
optional Starting Line VE or
optional 3-Step) wire, Hdr. 2,
W1
Timer Enable Wire, Hdr1, L2
Switched 12V Source in the
Vehicle
Trans-brake Button
(12V applied to these
wires when trans-
brake button is
depressed)
Trans-brake
BigStuff3 – SR
2
Wiring Diagram Using a Trans-Brake
2 & 3-Step via the MSD Ignition
On/Off Switch
Relay
86
30
85
87
Ground
87a