MSD 7222 7AL-2 Ignition Control Installation - Manual (Page 5)

INSTALLATION INSTRUCTIONS 5
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Noise Capacitor: MSD offers a Noise Capacitor or Filter to
help eliminate EMI noise. This capacitor, PN 8830, will also
protect the MSD and accessories from voltage and current
spikes.
ROUTING WIRES
The MSD wires should be routed away from direct heat
sources such as exhaust manifolds and headers and any
sharp edges. The trigger wires should be routed separate
from the other wires and spark plug wires. It is best if they
are routed along a ground plane such as the block or firewall
which creates an electrical shield. The magnetic pickup
wires should always be routed separately and should be
twisted together to help reduce extraneous interference (the harness supplied is already twisted).
The chart shows the polarity of other common magnetic pickups. If using a different magnetic pickup,
use the MSD 2-Pin connector, available as PN 8824, for a direct plug-in installation.
WARNING: The MSD 7 Series Ignitions are capacitive discharge ignitions. High voltage is present
at the coil primary terminals. Do not touch the coil or connect test equipment to the
terminals.
PRESTART CHECK LIST
• The only wires connected to the coil terminals are the MSD Orange to coil positive and Black to
coil negative.
• The small Red wire of the MSD is connected to a switched 12 volt source.
• The MSD power leads are connected directly to the battery positive and negative terminals.
• The battery is connected and fully charged if not using an alternator.
• The engine is equipped with at least one ground strap to the chassis.
TROUBLESHOOTING
Every MSD Ignition undergoes numerous quality control checks including a four hour burn-in test. If
you experience a problem with your MSD, our research has shown that the majority of problems are
due to improper installation or poor connections.
The Troubleshooting section has several checks and tests you can perform to ensure proper
installation and operation of the MSD. If you have any questions concerning your MSD, call our
Customer Support Department at (915) 855-7123, 7 - 6 mountain time.
Common Mag Pickup Wires
Distributor Colors
Mag+ Mag-
MSD Org/Blk Vio/Blk
MSD Crank Trigger Org/Blk Vio/Blk
Ford Orange Purple
Accel 46/48000 Series Org/Blk Vio/Blk
Accel 51/61000 Series Red Black
Chrysler Org/Wht Black
Mallory Org/Blk Vio/Blk
Figure 4 Common Mag Pickup Wires.