6421 Datasheet, PDF (13/28 Pages) Mallory performance club – The MSD produces full power multiple sparks for each firing of a plug

INSTALLATION INSTRUCTIONS
13
  GM IGNITIONS  Wiring a Dual Connector Coil.
2-STEP/LAUNCH ^BLUE
(12V TO ACTIVATE)
INDICATES CONNECTION
HALL-EFFECT ^WHITE/BLUE
(NOT USED)
MAGNETIC PICKUP
(NOT USED)
GREEN (-)
VIOLET (+)
HEAVY RED
TO BATTERY
GRAY
HEAVY BLACK
TO BATTERY
TACH OUTPUT
RED
RED
RED
WHITE
BLACK
ORANGE
BOTH
PINKS
BOTH
WHITES
BOTH
PINKS
BOTH WHITES
NOTE: If the vehicle is not equipped with a factory
tach, there will only be one white wire
going to the coil.
NOTE: MSD offers a direct plug in harness,
PN 8876, that makes this a splice free
installation.
  GM IGNITIONS  Wiring the 1996 and up single connector coil without harness.
2-STEP/LAUNCH ^BLUE
(12V TO ACTIVATE)
HALL-EFFECT ^WHITE/BLUE
(NOT USED)
MAGNETIC PICKUP
(NOT USED)
GREEN (-)
VIOLET (+)
HEAVY RED
TO BATTERY
GRAY
RED
HEAVY BLACK
TO BATTERY
TACH OUTPUT
WIRES
B AND C
WHITE
BLACK
WIRE
A
(PINK)
ORANGE
FACTORY HARNESS
(CUT FROM COIL)
WIRES
B AND C
NOTE: MSD offers a direct plug in harness,
PN 8877, that makes this a splice free
installation.
WIRE
A
(PINK)
NOTE: The coil connector is labeled A-B-C. The wire in the
A port is positive (pink).The wires in B and C are coil
negative wires, color will vary by application.
COIL
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