PN8737 Datasheet, PDF (1/4 Pages) Mallory performance club – MSD Module Selectors

MSD Module Selectors
Two Step, PN 8739
Three Step, PN 8737
ONLINE PRODUCT REGISTRATION: Register your MSD product online and you’ll be entered
in our monthly 8.5mm Super Conductor Spark Plug Wire give-away! Registering your product
will help if there is ever a warranty issue with your product and helps the MSD R&D team create
new products that you ask for! Go to www.msdignition.com/registration.
Parts Included:
1 - Module Selector
4 - Mounting Screws
1 - Parts Bag, Wiring Terminals
Note: Do NOT use solid core spark plug wires with any MSD component.
The MSD Module Selectors provide the ability to switch between two or three different rpm or degree
modules. The different modules are activated when 12 volts are applied to the corresponding activa-
tion wire. The Selectors work with either a Soft Touch Rev Control or any MSD Timing Control that
uses plug-in modules.
•The 2-Step Module Selector switches between two modules.
•The 3-Step Module Selector switches between three modules.
ACTIVATION WIRES
Module 2
Module 1
This is the default module. It is active when no voltage is present
on the other wires.
Active when 12 volts are applied to the Red Wire.
Module 3
Active when 12 volts are applied to the Blue Wire. (3-Step Only)
Note: If 12 volts are applied to the Red and Blue wires at the same time, Module 3
will be active.
MICRO SWITCH
PN 8820
TO MODULE SOCKET
SWITCH OR
TO LINE LOCK
OR TRANS-BRAKE
SOLENOID
TO 12V
RED
TO GROUND
BLACK
STEP
MODULE SELECTOR
TM
PN 8739
AUTOTRONIC CONTROLS CORPORATION
1490 HENRY BRENNAN DR, EL PASO, TX 79936
MODULE 2
MODULE 1
        Figure 1 Basic Two Step Module Selector Installation.
M S D  •  WWW.MSDPERFORMANCE.COM • [phone] • FAX [phone]