NO SPARK ON ANY CYLINDER:
If a mercury switch is connected to the switch box, disconnect it and retest. If you now have spark, replace the mercury switch.
Connect a spark gap tester to the high-tension lead coming from the ignition coil and set it to approximately 7/16”. When you crank the engine over, if it fires while the spark gap tester is connected to the coil and does not fire through the spark plug wires – there is a problem in the distributor cap, rotor button or spark plug wires.
Check the DC voltage present on the white trigger wire and the red terminal of the switch box while cranking. It MUST be at least 9½ volts. If not, there is a problem in the harness, key switch, starter, battery cables or battery.
Check DVA voltage between the blue terminal and engine ground while cranking (The trigger wire must be connected to the switch box). You should read at least 9V.
Disconnect the wire from the blue terminal of the switch box and connect a jumper wire to the terminal. Strike the other end of the jumper wire against engine ground. The CD module should fire each time. Failure to fire usually indicates a bad CD module.
Check DVA voltage on the green wire going to the coil, it should be over 100 volts at cranking.
NO SPARK OR INTERMITTENT SPARK ON ONE CYLINDER:
Connect a spark gap tester to the spark plug wires coming from the distributor cap and set the air gap to approximately 7/16”.
Align the rotor with #1 spark plug wire. Disconnect the wire from the blue terminal of the switch box and connect a jumper wire to the terminal. Strike the other end of the jumper wire against engine ground. Only the #1 spark plug wire should fire. If any other spark plug wire has fire, there is a problem in the distributor cap.
Repeat the test for the other cylinders.
NOTICE: The 4 cylinder engines using the 332-3213 ignition module and belt driven ignition driver DO NOT USE BATTERY VOLTAGE. Connecting 12V to the Red terminal will destroy the module.