Owners manual

8 INSTALLATION INSTRUCTIONS
MSD • WWW.MSDPERFORMANCE.COM • [phone] • FAX [phone]
GM IGNITIONS GM Large Cap HEI Distributors
FOUR PIN
SEVEN PIN
FIVE PIN
There are three different large cap HEI distributors. To identify which
of the following diagrams fit your specific application, remove the
distributor cap and rotor and locate the ignition module at the base
of the distributor. Count the number of terminals on both ends of
the module and follow the corresponding diagram. GM used 4, 5,
and 7-pin modules in these distributors.
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 [phone].
GM IGNITIONS Wiring an HEI 4-pin Module (Magnetic Pickup Trigger).
NOTE: The GM Ignition Module and
condenser are removed and
replaced with the supplied
PN 8861 Harness.
PN 8860
HARNESS
WHITE
JUMPER
KEY
CONNECTOR
HEAVY RED
OR PINK WIRE
FROM CAR
WIRING HARNESS
CONDENSER
GM-CABLE
HARNESS
GM MODULE
GROMMET
WIRE CLAMPS
REMOVE MODULEINSTALL HARNESS
MAGNETIC
PICKUP
CONNECTOR
PN 8861
HARNESS
B+
GND
C-
GREEN (-)
VIOLET (+)
WHITE
(NOT USED)
COVER WITH TAPE
GRAY
TACH OUTPUT
RED
WHITE
DIGITAL 6AL
REV
LIMITER
ORANGE*
BLACK*
*ORANGE - CONNECTS TO B+
*BLACK - CONNECTS TO C-
*WHITE - CONNECTS TO
BROWN AND TACH
*RED - CONNECTS TO 12
VOLTS AND PINK