6421 datasheet(16/28 Pages) MALLORY

16 / 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 an HEI 5 or 7-pin Module (Amplifier Trigger).

*WHITE - CONNECTS TO BROWN AND TACH

*RED - CONNECTS TO 12 VOLTS AND PINK

*ORANGE - CONNECTS TO B+

*BLACK - CONNECTS TO C-

MAGNETIC PICKUP

(NOT USED)

TO ENGINE

GROUND

ORANGE*

BLACK*

RED

WHITE

HEAVY RED

HEAVY BLACK

TO BATTERY

GREEN (-)

VIOLET (+)

BLUE

WHITE/BLUE

HALL-EFFECT

(NOT USED)

2-STEP/LAUNCH

(12V TO ACTIVATE)

BLACK

BROWN

HEAVY PINK

OR RED FROM

VEHICLE WIRE

HARNESS

DISTRIBUTOR

CONNECTOR

PINK

TO TACH

RED*

RED

JUMPER

WHITE*

WHITE

JUMPER

18" BLACK

TO GROUND

FACTORY

HARNESS

GRAY

TACH OUTPUT

NOTE: Some 5-pin models may experience a hesitation or stall on deceleration.If

this occurs, contact MSDTech Line for the required bolt-in diode to correct

the problem. MSD Tech Line (915) 855-7123.

FORD IGNITIONS Wiring a Ford DuraSpark using White Wire Trigger.

RED

WHITE

GREEN

RED

FORD COIL

CONNECTOR

C+

MAGNETIC PICKUP

(NOT USED)

ORANGE (TO COIL +)

BLACK (TO COIL -)

RED

GREEN (-)

VIOLET (+)

WHITE

BLUE

WHITE/BLUE

HALL-EFFECT

(NOT USED)

2-STEP/LAUNCH

(12V TO ACTIVATE)

HEAVY RED

HEAVY BLACK

TO BATTERY

GRAY

TACH OUTPUT

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