MSD 89631 Programmable Shift Light Installation - Manual (Page 3)

INSTALLATION INSTRUCTIONS 
M S D I G N I T I O N
• w w w . m s d i g n i t i o n . c o m • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • FA X ( 9 1 5 ) 8 5 7 - 3 3 4 4
BLACK GROUND
GMR PICKUP
RED
GREEN
SWITCHED
12 VOLT
SIGNAL
OUTPUT
GMR PICKUP
NOTE: The brass screw must be used for proper operation.
PRIMARY COIL (+) WIRE OR
DIESEL INJECTOR 12 VOLT WIRE
WASHER MUST BE ON TOP OF METAL TAB METAL TAB
COIL
HARNESS
IGNITION
COIL
IGNITION
COIL
IGNITION
COIL
IGNITION
COIL
COIL (+)
12 VOLTS
COIL (-)
TRIGGER 4
COIL (-)
TRIGGER 3
COIL (-)
TRIGGER 2
COIL (-)
TRIGGER 1
GMR PICKUP
GREEN
SHIFT LIGHT
BLACK GROUND
UP
MODE
DOWN
Note: The shift light must
be programmed
for 1-cylinder op-
eration.
Figure 5 Installation on an Inductive Coil-Per-Cylinder Ignition System.
Figure 6 Installing to an Inductive Coil Pack.
BLACK GROUND
RED
GREEN
SWITCHED
12 VOLT
SIGNAL
OUTPUT
GREEN
GMR PICKUP
NOTE: The brass screw must be used for proper operation.
PRIMARY COIL (+) WIRE OR
DIESEL INJECTOR 12 VOLT WIRE
WASHER MUST BE ON TOP OF METAL TAB METAL TAB
GMR PICKUP
GMR PICKUP
C
O
IL
(
-)
2
C
O
IL
(
-)
1
C
O
IL
(
+
)
IGNITION 12 VOLTS
TRIGGER COIL 1
TRIGGER COIL 2
COIL HARNESS
POWERTRAIN CONTROL MODULE
BLACK GROUND
UP
MODE
DOWN
RED
Note: The shift light must
be programmed
for two (2) cylinder
operation.
GMR PICKUP INSTALLATION
The MSD GMR pickup can be used with in-
ductive or capacitive ignition types to provide
an rpm signal of 30% duration when the igni-
tion coil fires. Two washers are provided with
the pickup and must be installed in one of two
positions depending on the type of ignition
driving the coil. For late model applications, it
is recommended to have a wiring schematic
of the vehicle’s ignition system. On some
motorcycle and ATV applications, the stock
coils do not produce a long enough pulse. In these cases, loop the coil wire through the GMR
pickup twice (Figure 4).
Figure 4 Looping Coil Wire.
PRIMARY COIL (+) WIRE
WASHER MUST BE ON TOP OF METAL TAB
METAL TAB
GMR PICKUP