6421 datasheet(13/28 Pages) MALLORY

13 / 28 page

INSTALLATION INSTRUCTIONS

MSD • W W W. M S D PE R F OR M A NC E . C OM • ( 91 5 ) 8 55 - 7 12 3 • F AX ( 91 5 ) 8 57 - 33 4 4

GM IGNITIONS

Wiring a Dual Connector Coil.

BOTH

PINKS

BOTH

PINKS

BOTH

WHITES

BOTH WHITES

WHITE

RED

INDICATES CONNECTION

RED

MAGNETIC PICKUP

(NOT USED)

HEAVY RED

HEAVY BLACK

TO BATTERY

ORANGE

BLACK

GREEN (-)

VIOLET (+)

BLUE

WHITE/BLUE

HALL-EFFECT

(NOT USED)

2-STEP/LAUNCH

(12V TO ACTIVATE)

GRAY

TACH OUTPUT

NOTE:Ifthevehicleisnotequippedwithafactory

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.

COIL

WIRE

(PINK)

WIRE

(PINK)

WIRES

B AND C

WIRES

B AND C

FACTORY HARNESS

(CUT FROM COIL)

MAGNETIC PICKUP

(NOT USED)

HEAVY RED

HEAVY BLACK

TO BATTERY

RED

GREEN (-)

VIOLET (+)

WHITE

BLACK

ORANGE

BLUE

WHITE/BLUE

HALL-EFFECT

(NOT USED)

2-STEP/LAUNCH

(12V TO ACTIVATE)

GRAY

TACH OUTPUT

NOTE: MSD offers a direct plug in harness,

PN 8877, that makes this a splice free

installation.

GM IGNITIONS Wiring the 1996 and up single connector coil without harness.

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.

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