MS4 Lumenition Performance Ignition Optronic Mega Spark 4 Coil (inc ballast res)

MS4 Lumenition Optronic Ignition System

Checking For a Ballast Resistor

Note: This test involves the use of a voltmeter suitable for reading voltages from

0-15 volts.

Step 1: Disconnect the lead or leads connected to the negative - terminal on the coil.

Step 2: With a suitable length of wire, connect one end to the Coil Negative – terminal and the other end to an earth point.

Step 3: Connect the voltmeter to the positive + terminal on the coil.

Step 4: Switch on the ignition. The voltmeter should read battery voltage.

With the ignition still On.

- If the voltage on the voltmeter remains at battery voltage, there is no ballast resistor present in circuit.

- If the ballast resistor is present in the circuit, the voltage will drop to approximately 9v volts.

Step 5: Immediately switch off ignition.

Note: Never leave the earth lead connected to the coil for more than is required for the test, as continued connection will result in an overheated, damaged coil and a drained battery.

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