INSTALLATION INSTRUCTIONS 13
M S D
• W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
GM IGNITIONS Wiring with an MSD Wiring Harness.
HARNESS PN 8877
FACTORY HARNESS
(UNPLUGGED FROM COIL)
COIL
RED
WHITE
BLACK
ORANGE
MAGNETIC PICKUP
(NOT USED)
GRAY
TACH OUTPUT
GREEN (-)
VIOLET (+)
RED
WHITE
BLACK
ORANGE
DIGITAL 6AL
REV
LIMITER
Harness PN 8876
- Dual Connector Coil.
Harness PN 8877
- 1996-on GM Vehicles.
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 (915) 855-7123.
