MSD 7222 7AL-2 Ignition Control Installation - Manual (Page 8)

8 INSTALLATION INSTRUCTIONS
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• W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
CHECKING FOR SPARK
If triggering the ignition with the White wire:
1. Make sure the ignition switch is in the “Off” position.
2. Remove the coil wire from the distributor cap and
set the terminal approximately 1/2” from ground.
3. Disconnect the MSD White wire from the distributor’s
points or ignition amplifier.
4. Turn the ignition to the "On" position. Do not crank
the engine.
5. Rapidly tap the White wire to ground several times.
When the wire is pulled from ground, a spark should
jump from the coil wire to ground. If spark is present,
the ignition is working properly. If there is no spark
skip to step 6 below:
If triggering with the Magnetic Pickup:
1. Make sure the ignition switch is in the “Off” position.
2. Remove the coil wire from the distributor cap and
set the terminal approximately 1/2” from ground.
3. Disconnect the MSD magnetic pickup wires from
the distributor.
4. Turn the ignition to the "On" position. Do not crank
the engine.
5. With a small jumper wire, short the MSD’s Green
and Violet magnetic pickup wires together. Each
time you break this ground (rapidly), a spark should
jump from the coil wire to ground. If spark is present,
the ignition is working properly. If there is no spark
skip to step 6 below:
6. If there is no spark:
A. Inspect all of the wiring.
B. Substitute another coil and repeat the test. If there is now spark, the coil is at fault.
C. If there is still no spark, check to make sure there is 12 volts on the small Red wire from the
MSD when the key is in the "On" position. If 12 volts is not present, find another switched 12 volt
source and repeat the test.
D. If, after following the test procedures and inspecting all of the wiring, there is still no spark, the
MSD Ignition is in need of repair. See the Warranty and Service section for information.
If there is no spark, but the LED flashes, check for a coil problem.
The following wiring diagrams illustrate numerous installations on different vehicles and applications.
If you experience difficulties when installing your MSD, contact our Customer Support Department at
(915) 855-7123 (7 - 6 Mountain time) or e-mail us at: [email protected]
GREEN
JUMPE R
WIRE
VIOLE T
MAGNETIC PICKUP TRIGGER
WHITE WIRE TRIGGER
Figure 8 Checking for Spark with Magnetic Pickup.
Figure 7 Checking for Spark with a White Wire.