Technical information

AUTOTRONIC CONTROLS CORPORATION • 1490 HENRY BRENNAN, EL PASO, TEXAS 79936 • [phone] • FAX [phone]
www.msdignition.com email: [e-mail]
86
MSD SHIFT LIGHT, PN 8952
MSD SHIFT LIGHT, PN 8952,
TO MSD IGNITION
OR
C+
C-
IGN
PTS
M+
M-
TAC H
OUTPUT
RPM
MODULE
IGNITION
TM
Multiple
Spark
Discharge
PART NO.
AUTOTRONIC CONTROLS CORPORATION
SERIAL NO..
SHIFT LIGHT
TACH
OUTPUT
TERMINAL
TACH
OUTPUT
TERMINAL
BLACK TO GROUND
RED
MSD 7,8, OR 10 SERIES
MSD 6 SERIES
TO SWITCHED
12 VOLTS
GREEN TO TACH OUTPUT
This section covers the MSD Shift Light, PN 8952. The Light will activate at a desired rpm which is controlled by
MSD’s white RPM Modules. If no rpm module is installed in the Light, it will not turn on. The Light can be used with
stock ignitions or with MSD Ignition Controls.
Wire F unctions
Red: Connects to switched 12 volt source
Black: Connects to ground
Green: This is the rpm input wire that picks up engine rpm. It connects to the tach output terminal of an
MSD Ignition. When used with inductive or factory ignitions it connects to the coil negative terminal.
Cylinder Programming
The Shift Light is programmed for 8-cylinder opera-
tion. There are three wire loops, that need to be modi-
fied for use on other engine configuration. For a 6-
cylinder engine, cut one loop. Cut two loops for 4-
cylinder engines and three loops for two cylinder en-
gines.
Note: Once installed, whenever the ignition is turned
On, the Shift Light will flash to confirm operation.