To see to testing a ignition control module from here.The electronic ignition control module is a solid state switch “On/Off” for the ignition system.
Testing a Ignition Control Module
The module receives a signal from a sensor inside the distributor. The signal is then used to ignite the ignition coil, which generates the energy for the spark plugs. The ignition module can be located inside the distributor, on the distributor housing or on the side of the engine compartment. When a module becomes bad, it usually fails completely and the engine does not run at all. Checking your ignition module is a simple task that requires only the simplest tools.
Step 1
Remove an ignition cable from the spark plug and insert an old spark plug into the end of the spark plug sheath. Place the spark plug on a metal surface on the engine. Start the engine and check the old spark plug for a spark. No spark on the spark plug indicates an ignition problem.
Step 2
With the ignition key switched on, check the voltage at the positive terminal of the coil. Place the red cable of the multimeter on the positive coil connection. Connect the black cable to the negative terminal of the battery. Switch the ignition switch to the “Run” position. The multimeter should read the battery voltage at the positive terminal. If there is no voltage, the problem is with the ignition switch or the ignition wiring.
Step 3
Locate the positive (+) wire of the ignition module. Turn the “Run” key without starting the engine. Pierce the positive wire with the red wire of the multimeter. There should be a battery voltage indicator on the cable. If no battery voltage is present, check whether there is an open circuit between the cable and the ignition switch.
Step 4
Locate the negative (-) wire of the ignition module. Pierce the negative pole with the red wire of the multimeter. Remove the distributor cap without removing the spark plug cables. Turn the distributor center shaft by hand or by starting the engine. Observe the distributor rotor while the engine is being cranked. If the transfer rotor does not rotate, the transfer rotor or transfer gearbox is poor. The multimeter should indicate the voltage alternating between battery voltage and zero.
Replace the ignition module if the multimeter reading does not fluctuate between battery voltage and zero during distributor rotation. Mount the distributor cap and secure it to the distributor. Disconnect the multimeter from the ignition module and the battery.
Tip
A fender cover or an old ceiling protects the surface of your vehicle when you work under the hood.
Items you need
Old spark plug
Digital Multimeter