Technical information

AUTOTRONIC CONTROLS CORPORATION • 1490 HENRY BRENNAN, EL PASO, TEXAS 79936 • [phone] • FAX [phone]
www.msdignition.com email: [e-mail]
57
PROGRAMMABLE WIRE OPERATION
These are the two heavy 12 gauge wires and are responsible for
getting direct battery voltage to the ignition. The Ignition is load
protected from reverse battery connections and will automatically
shut down if there is over 27 volts input.
This wire connects directly to the battery positive (+) terminal or a
positive battery junction such as the starter solenoid.
Note: Do not connect to the alternator.
This wire connects to a good ground, either at the battery negative
(-) terminal or to the engine.
Power Leads
Heavy Red
Heavy Black
Red
Orange
Black
Trigger
Wires
White
Violet
and Green
(Magnetic
Pickup
Connector)
This wire is responsible for turning the MSD On and Off. Connects
to a switched 12 volt source such as the ignition key or switch.
This wire connects to the coil positive (+) terminal. This is the ONLY
wire that makes electrical contact with the positive coil terminal.
This wire connects to the coil negative (-) terminal. This is the ONLY
wire that makes electrical contact with the negative coil terminal.
There are two circuits that can be used to trigger the MSD Ignition;
a Points circuit (the White wire) and a Magnetic Pickup circuit (the
Green and Violet wires). The two circuits will never be used at the
same time.
This wire is used to connect to breaker points, electronic ignition
amplifier output or to the trigger output of the ECU. When this wire
is used, the Magnetic Pickup connector is not used.
These wires are routed together in one harness as the magnetic
pickup connector. The connector plugs directly into an MSD
distributor or crank trigger. It will also connect to aftermarket pickups.
The Violet wire is positive (+) and the Green wire is negative (-).
When these wires are used, the White wire is not.
This 2-pin connector plugs into a Cam Sync Sensor to indicate when
the number one cylinder is triggered. The wires are Lt Blue and Lt
Green.
This is where the fiber optic cable of the PN 7555 Inductive Sync Kit
connects to take advantage of the Individual Cylinder Management
feature. This must be covered when using the 2-pin cam sync
input.
When 12 volts are applied, this wire activates several features
including; Launch rev limit, Launch Retard value, Launch Timing
Curve and will reset the Shift Light sequence to 1
st
gear.
This wire activates the Burnout rev limit when 12 volts are applied.
This wire activates the first retard stage when it is applied to 12
volts. When 12 volts is removed the retard is deactivated.
This wire activates the second retard stage when it is applied to 12
volts. When 12 volts is removed the retard is deactivated.
This wire activates the third retard stage when it is applied to 12
volts. When 12 volts is removed the retard is deactivated.
Shift Light activation wire. Supplies ground to activate a light.
RPM Activation Switch. This wire will supply a ground to complete a
circuit at a desired rpm. It will handle up to 3 amps continuous.
Cam Sync
Lt Blue and
Lt Green
Fiber Optic
Connection
Accessories
Dark Blue
Light Blue
Pink
Violet
Ta n
Yellow
Brown/White