MSD 64602 Installation
MSD 6M-2/MSD Off-Road Ignition
To GM Dual Connector Coil Harness
PN 64602
Parts Included:
1 - Harness 1 - Instruction Maunal
WARNING: During installation, disconnect the battery cables. When disconnecting, always
remove the negative cable first and install it last.
This harness is designed to provide a splice free and simple installation of an MSD 6M-2
Marine Ignition Control, PN 6460, or MSD 6-Offroad Ignition, PN 6470 to engines equipped
with GM's dual Connector Coil (Figure 1).
Note: In some cases, an MSD Tach/Fuel Adapter may be required for correct tachometer
and fuel injection operation, there is also a connector for the Adapter, PN 8910.
Figure 1
All of the connectors plug directly into the corresponding connectors on the ignition and coil
(Figure 1).
1. Disconnect the Gray connector followed by the Black connector from the coil.
2. Connect the Black then the Gray connector to the MSD PN 64602 Harness.
3. Connect the other end of the harness to the coil. Note: the connector will only fit on one side
of the coil. Only two wires go to the coil with an MSD Ignition Control installed.
4. Connect the 6-Pin Weathertight connector to the MSD Control.
5. If your application requires an MSD Tach/Fuel Adapter, Connect the remaining 2 Black wires
to the MSD Adapter.
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TECH NOTES
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Service
In case of malfunction, this MSD component will be repaired free of charge according to the terms of the warranty.
When returning MSD components for warranty service, Proof of Purchase must be supplied for verification. After
the warranty period has expired, repair service is based on a minimum and maximum fee.
All returns must have a Return Material Authorization (RMA) number issued to them before
being returned. To obtain an RMA number please contact MSD Customer Service at 1 (888) MSD-7859 or visit
our website at www.msdperformance.com/rma to automatically obtain a number and shipping information.
When returning the unit for repair, leave all wires at the length in which you have them installed. Be sure to include
a detailed account of any problems experienced, and what components and accessories are installed on the vehicle.
The repaired unit will be returned as soon as possible using Ground shipping methods (ground shipping is covered
by warranty). For more information, call MSD at (915) 855-7123. MSD technicians are available from 7:00 a.m. to
5:00 p.m. Monday - Friday (mountain time).
Limited Warranty
M
SD warrants this product to be free from defects in material and workmanship under its intended normal use*,
when properly installed and purchased from an authorized MSD dealer, for a period of one year from the date of
the original purchase. This warranty is void for any products purchased through auction websites. If found to be
defective as mentioned above, it will be repaired or replaced at the option of MSD. Any item that is covered under
this warranty will be returned free of charge using Ground shipping methods.
This shall constitute the sole remedy of the purchaser and the sole liability of MSD. To the extent permitted by
law, the foregoing is exclusive and in lieu of all other warranties or representation whether expressed or implied,
including any implied warranty of merchantability or fitness. In no event shall MSD or its suppliers be liable for special
or consequential damages.
*Intended normal use means that this item is being used as was originally intended and for the original application
as sold by MSD. Any modifications to this item or if it is used on an application other than what MSD markets the
product, the warranty will be void. It is the sole responsibility of the customer to determine that this item will work for
the application they are intending. MSD will accept no liability for custom applications.
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© 2012 Autotr onic Co ntrols Corpor ation
FRM24036 Revised 04/12 Printed in U.S.A.
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