INSTALLATION INSTRUCTIONS

5

Grounds: A poor ground connection can cause many frustrating problems. When a wire is specified

to go to ground, it should be connected to the battery negative terminal, engine block or chassis.

There should always be a ground strap between the engine and the chassis. Always securely connect

the ground wire to a clean, paint free metal surface.

Ballast Resistor: If your vehicle has a ballast resistor in line with the coil wiring, it is recommended

to bypass it.

ROUTING WIRES

The MSD wires should be routed away from direct heat sources such as exhaust manifolds and

headers and any sharp edges. The trigger wires should be routed separate from the other wires

and spark plug wires. It is best if they are routed along a ground plane such as the block or firewall

which creates an electrical shield. The magnetic pickup wires should always be routed separately

and should be twisted together to help reduce extraneous interference.

WIRE FUNCTIONS

These are the two heavy gauge wires (12 gauge) and are responsible for

getting direct battery voltage to the Ignition. The ignition has an internal fuse

so no fuse is necessary.

This wire connects directly to the battery positive (+) terminal or to a positive

battery junction or the positive side of the starter solenoid.

Note: Never connect the alternator.

This wire connects to a good ground, either at the battery negative (-) terminal

or to the engine.

Connects to a switched 12 volt source. Such as the ignition key or switch.

Connects to the positive (+) terminal of the coil.

This is the only wire that makes electrical contact with the coil positive

terminal.

Connects to the negative (-) terminal of the coil.

This is the only wire that makes electrical contact with the coil negative

terminal.

There are two circuits that can be used to trigger the MSD Ignition; a Points

circuit (White wire) and a Magnetic Pickup circuit (Violet and Green wires).

The two circuits will

never be used together.

This wire is used to connect to the points, electronic ignition amplifier output

or to the Yellow wire of an MSD Timing Accessory.

When this wire is used,

the Magnetic Pickup connector is not used.

These wires are routed together in one harness to form the Magnetic Pickup

connector. The connector plugs directly into an MSD Distributor or Crank

Trigger. It will also connect to factory magnetic pickups or other aftermarket

pickups. The Violet wire is positive (+) and the Green is negative (-).

When

these wires are used, the White wire is not.

POWER LEADS

HEAVY RED

HEAVY BLACK

RED

ORANGE

BLACK

TRIGGER

WIRES

WHITE

VIOLET

AND GREEN

(MAGNETIC

PICKUP

CONNECTOR)