Msd 89631 Programmable Shift Light Installation- User Manual

MSD Digital Shift Light

PN 89631

WARNING

: When installing the Shift Light disconnect the battery cables. When disconnecting,

always remove the negative cable first and install it last.

Parts Included:

1 - Shift Light

1 - Mounting Bracket

1 - GMR Pickup, PN 8918

2 - Washers

1 - Brass Screw

1 - Parts Bag

UP

MODE

DOWN

PROGRAMMING

BUTTONS

RED TO SWITCHED 12 VOLTS

GREEN TO TACH SIGNAL

BLACK TO GROUND

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

Use Up/Down

buttons to adjust

cylinders, intensity

and rpm points.

Figure 1 Digital Shift Light Wiring and Programming.

PROGRAMMING

By pressing the two buttons simultaneous-

ly, you get the Shift Light into the different

programming modes.

RPM:

To adjust the rpm, press the two but-

tons until the rpm shows. Notice that all

of the numbers 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 dis-

play 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 but-

tons. On single cylinder two stroke or four

stroke applications that fire every revolution

(waste spark systems) the shift light should be programmed for two cylinder operation for correct op-

eration.

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 push-

ing 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 Ig-

nition Control 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.

IMPORTANT

:

Do NOT connect to the coil (-) terminal.

The supplied GMR pickup must be used

when installing 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 con-

nected to a high voltage trigger source.

M S D I G N I T I O N

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