PN89631 Datasheet, PDF (1/4 Pages) Mallory performance club – MSD Digital Shift Light

MSD Digital Shift Light
PN 89631
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Parts Included:
1 - Shift Light
1 - Mounting Bracket
1 - GMR Pickup, PN 8918
2 - Washers
1 - Brass Screw
1 - Parts Bag
WARNING: When installing the Shift Light disconnect the battery cables. When disconnecting, always
remove the negative cable first and install it last.
IMPORTANT:
Do NOT connect to the coil (-) terminal. The supplied GMR pickup must be used when in-
stalling the Digital Shift Light unless the rpm signal is coming from the tach output of an MSD
Ignition or aftermarket ECU. Damage to the DSL will occur if connected to a high voltage trig-
ger source.
PROGRAMMING
By pressing the two buttons simultaneously,
you get the Shift Light into the different pro-
gramming modes.
RPM: To adjust the rpm, press the two buttons
until the rpm shows. Notice that all of the num-
bers flash. Adjust the rpm then push the two
buttons again to move to the next mode. The
rpm can be set up to 16,000 rpm. Once you
go over 9,900 rpm, the display will show 1,000
indicating 10,000 rpm and higher.
Cylinder Count: The display will read CY and
allow you to select between one to 12-cylinder
engines using the Up/Down buttons. On single
cylinder two stroke or four stroke applications
that fire every revolution (waste spark systems)
the shift light should be programmed for two cyl-
inder operation for correct operation.
PROGRAMMING
CY - Cylinder Count
12, 10, 8, 6, 6 odd, 4, 2, 2 odd, 1
LuL - Light Intensity
Scale of 9-0 Bright to Dim
PROGRAMMING
BUTTONS
Use Up/Down
buttons to adjust
cylinders, intensity
and rpm points.
UP DOWN
MODE
RED TO SWITCHED 12 VOLTS
GREEN TO TACH SIGNAL
BLACK TO GROUND
Figure 1 Digital Shift Light Wiring and Programming.
Intensity: Control the intensity of the LED and read out. Hold the buttons until LuL displays. Use the buttons
to select from 9 (brightest) to 0 to turn off the shift light.
Self: Self mode will walk through all of the settings programmed into the light. It will first show the rpm shift
value for the shift light, the cylinder count and light intensity. Start the test mode by pushing either button once
Self is displayed. To reset the Self mode, push either button when SELF is displayed, or turn the power Off.
Each time the DSL is powered on, the LED will display the program values that are set.
INSTALLATION
The Shift Light installs easily with the GMR Pickup or through the tach output terminal of an MSD Ignition Con-
trol or aftermarket ECU. It will accept a trigger signal rated from 0-24 volt amplitude. Never connect the Green
Wire directly to the coil negative terminal.
If an ignition control or aftermarket ECU are not being used, the GMR pickup must be connected.
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