Technical information

AUTOTRONIC CONTROLS CORPORATION • 1490 HENRY BRENNAN, EL PASO, TEXAS 79936 • [phone] • FAX [phone]
www.msdignition.com email: [e-mail]
93
The PN 8680 Timing Control easily connects to an MSD Ignition. Timing adjustments can be made by the driver
with a dash mounted control knob. The timing can be retarded up to 15°. When the control knob is at full clockwise
position, the timing will be at the factory setting.
General Wiring
Trigger Wires
Magnetic Pickup Loop: When used with a magnetic pickup, a white wire loop must be cut. The loop is with the
cylinder select loops. See page 91.
Control Knob: The control knob wiring is routed through a 2-Pin Weathertight Connector. It does not matter which
color wire is connected to which.
Cylinder Select: There are two wire loops under the small cover on the side of the control. For 6-cylinder operation,
cut the Red loop, for 4-cylinder engines, cut both the Red and Blue loop. See page 91.
ADJUSTABLE TIMING CONTROL, PN 8680
Red:
Black:
Yellow:
Connects to switched 12 volt source.
Connects to ground.
This is the trigger output to the Ignition. It will connect to the MSD’s White wire or Points
terminal.
White:
Violet and Green:
Connects to points or an ignition amplifier output. When this wire is used the Magnetic
Pickup is not (Violet and Green).
These wires are routed together in one harness and form the magnetic pickup connector.
This connector plugs directly into an MSD Distributor or Crank Trigger. The Violet wire is
positive (+) and the Green wire is negative (-). When this connector is used, the White wire
is not and should be sealed.
HEAVY RED
TACH
OUTPUT
FROM
IGNITION KEY
(ORIGINAL COIL WIRE)
IGNITION KEY
RED
TO 12V
HEAVY BLACK
OR
GREEN
VIOLET
DISTRIBUTOR
WITH
MAGNETIC PICKUP
MSD CRANK
TRIGGER WHEEL
DISTRIBUTOR
+
+
TO BATTERY
TO BATTERY
+
Multiple
Spark
Discharge
PART NO.
AUTOTRONIC CONTROLS CORPORATION
SERIAL NO..
IGNITION
®
BLACK
WHITE
WHITE
RED
YELLOW
WHITE
NOT USED
TO GROUND
TIMING
CONTROL
PN 8680
PN 8860
IGNITION
TM
1
3
5
7
9
1
1
1
3
1
5
A
D
V
A
N
C
E
ORANGE
BLACK
PN 8680 TO MAGNETIC PICKUP