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GMC ZE06581 1976 Maintenance Manual Supplement page 95

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5 . Disengage yellow and red coil wire term-
inals by pushing coil leads from underside of
connector,
and
remove
ignition
coil from
distributor cap .
NOTE :
The yellow and red wires are both
primary. The two black wires are ground for
secondary . The primary and secondary coil
windings are isolated, as shown in figure 12 .
6 . Check
condition
of seal and resistor
brush (spring and button). (Refer to figure 4 .)
NOTE: Do not wipe silicone lubricant from
seal .
IGNITION COIL INSTALLATION
1 . Position
resistor
brush
(spring
and
button) and seal in distributor cap .
NOTE:
Make sure seal is coated with
silicone lubricant and properly positioned in
place .
2 . Position coil into distributor cap with
terminals over connector at side of cap .
NOTE:
If replacing ignition coil, be sure
part number is correct.
3. Push coil lead wires into connector on
side of cap (figure 15) .
4 . Install two ground wires and four coil
attaching screws.
5 . Install coil cover onto distributor cap
with three attaching screws .
6 . Position
distributor
cap
on
housing,
making sure cap is seated properly, and engage
four locking latches .
7 . Connect
ignition/tachometer
wiring
harness connector at ignition coil terminal;
connect spark plug wire holder at distributor
cap terminal.
ELECTRONIC MODULE REMOVAL
1 . Disconnect
ignition/tachometer
wiring
harness connector at ignition coil terminal
connector . .
2 . Disconnect spark plug wire holder from
distributor cap terminals.
3 . After releasing four lock latches, : remove
distributor cap and position out of way .
4. Remove rotor from distributor shaft by
loosening two screws.
5 . Remove module attaching screws (2) and
lift module from housing . Disconnect wiring
leads from module where connector attaches
ENGINE ELECTRICAL 6Y- 1 7
Figure 15-Coil Replacement
to module "B" and "C" terminals, and remove
two leads from "W" and "G" module terminals.
NOTE:
Do not wipe lubricant from module
or distributor housing unless replacing the
module . A tube of special silicone grease is
supplied with each
replacement
module .
When installing module, be sure module has
"dabs" of silicone grease on back of module
where
module
rests
on
metal
mounting
surface. If not applied, the module will not
cool properly, which can cause the module
to malfunction .
ELECTRONIC MODULE INSTALLATION
1 . Install module with attaching screws (2).
2 . Install connector to "B" and "C" term-
inals on module with tab on top and connect
green  wire to "G" terminal and white wire to
"W" terminal .
3 . Install rotor to advance weight plate and
tighten retaining screws .
4 . Position distributor cap to housing with
tab in base of cap aligned with notch in
housing, and secure with four latches.
5 . Connect
wiring
harness connector to
terminals on side of distributor cap.

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