MSD 6421 User Manual

16 INSTALLATION INSTRUCTIONS
MSD • WWW.MSDPERFORMANCE.COM • (915) 855-7123 • FAX (915) 857-3344
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*
ORANGE*
BLACK*
BLACK*
B+
GND
C-
RED
WHITE
HEAVY RED
HEAVY BLACK
TO BATTERY
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 MSD Tech 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+
TACH
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
TO BATTERY
+
GRAY
TACH OUTPUT

MSD 6421 Specifications

General

Brand	MSD
Model	6421
Category	Control Unit
Language	English