MSD 8996 Multi-Channel Digital Ignition Tester Installation - Manual (Page 2)

 INSTALLATION INSTRUCTIONS
M S D I G N I T I O N
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RPM ADjUSTMENT
The MSD Digital Tester has two rpm adjustments; Coarse and Fine:
Coarse Adjustment: When this knob is turned clockwise the rpm will
increase in 100 rpm increments. This allows a large spread of rpm to
be covered in a short period of time.
Fine Adjustment: When this knob is turned clockwise the rpm will
increase in 1 rpm increments for precise adjustments.
INSTALLATION & USE
1. Be sure the ignition is Off.
2. Remove the coil wire from the distributor cap and install the MSD Test Plug. Connect the Plug to
a ground source. Make sure the ground source is paint and corrosion free.
WARNING: A spark is going to jump across the tester’s gap. Make sure there are no fuel sources
or wiring near the tester.
4. Attach the Tester’s Red wire to a 12 volt source such as the positive battery terminal.
5. Connect the Black wire to ground.
6. Connect the trigger wire(s) to fit your application. This will be the wire(s) with the White alligator clips
or the 2-pin connector for magnetic pickups. See the following wiring diagrams in pages 2 - 4 for your
application. Note: The 2-pin Mag-pickup, Violet/Green connector will never be used with the other
trigger wires.
7. Make sure both the coarse and the fine adjustments on the tester are turned to the full counter
clockwise position (zero).
8. Turn the ignition switch On and press the red button of the Tester until your appropriate engine
combination is selected.
9. Increase the Coarse adjustment until you reach the desired rpm. Note that the test plug will be
firing. The fine adjustment can be used to get the exact rpm you desire.
Figure 2 Adjusting the Tester’s RPM.
CAM SYNC
PICKUP OUTPUT
NOT USED
Figure 3 Testing an MSD Triggered with Points or an Amplifier.