IGNITOR Module Test

Turn ignition on, but do not start engine. Connect voltmeter negative lead to a good engine ground. Connect positive lead to ignition coil negative terminal.
Voltmeter should read battery voltage (12 volts). If not, proceed to step 4). If battery voltage is present, turn ignition off, and check air gap at distributor pick-up coil.
If air gap is not to specification, adjust pick-up coil. If okay, disconnect all wires from ignition coil primary terminals, and check both primary and secondary coil resistance. If not to specifications, replace ignition coil. If okay, proceed to step 9).
Connect voltmeter negative lead to a good engine ground. Connect positive lead to ignition coil positive terminal. Turn ignition on. Voltmeter should again read battery voltage.
If not, check power supply harness, ignition switch, fuse and noise suppressor condenser. Repair or replace components, as necessary.
If battery voltage was present in step 4), turn ignition off. Disconnect distributor wire from ignition coil negative terminal. Turn ignition on.
Voltmeter should read battery voltage. If so, proceed to step 9). If not, turn ignition off, and disconnect tachometer wire from ignition coil negative terminal. Turn ignition on.
Voltmeter should read battery voltage. If not, replace ignition coil. If voltmeter indicated battery voltage in step 7) with tachometer disconnected, check tachometer system for short circuit. Repair or replace, as necessary.
If ignition coil resistance was okay in step 3) or if battery voltage at negative coil terminal was present in step 7), check for short circuit or open circuit between ignitor, and ignition coil and distributor pick-up coil.
If wiring from ignitor is okay, replace pick-up coil and ignitor.