MSD 8875 Wiring Harness, GM HEI Installation - Manual

MSD to GM HEI Distributor Harness
PN 8875
IMPORTANT: Review the installation procedures of the MSD 6
Series Ignition prior to connecting the wiring harness.
This Harness is designed to simplify the installation of an MSD 6 Series
Ignition Control to a GM HEI Distributor that uses a 5-pin or 7-pin
module (Figure 1). Most of these distributors DO NOT have a vacuum
advance.
Note: On HEI distributors with a 4-pin module, this Harness cannot be used.
1. Disconnect the 12 volt key connector,
the 3-wire connector coming out of the
distributor and the Tach Connector (if
applicable).
2. Connect the Pink, Black and one of the
Brown wires of the Harness to the corre-
sponding wires of the 3-wire connector
coming out of the distributor.
3. Connect the Red wire of the Harness to
the key connector.
4. Plug the 3-wire connector of the Harness
into the distributor cap.
5. Connect the Orange, Black, Red and
White wires of the Harness to the cor-
responding wires of the MSD Ignition
Control.
6. If there was a tach wire going into the
distributor cap, connect it to the other
brown wire of the MSD harness. If a
tach is not being used, tape and seal
this connector.
Figure 2 Wiring the PN 8875 Harness
Figure 1 Different
HEI Modules.
M S D I G N I T I O N
• w w w . m s d i g n i t i o n . c o m • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • FA X ( 9 1 5 ) 8 5 7 - 3 3 4 4