Note: This test is applicable only for 3-5 ohms 12V single lead externally grounded ignition system.
Tool required: – Multi-tester
- Remove the ignition coil from motorcycle.
- Test the resistance of primary coil:
– Set ohmmeter to Rx1; – Red lead (+) on ignition coil primary wire (the connection to CDI); – Black lead (-) on ignition coil ground; – normal reading ranges from 3 to 5 ohms, – failed if infinity ohms (indicates open circuit or break in coil winding).
- Test the resistance of secondary coil:
– Set ohmmeter to Rx1000; – Red lead (+) on ignition coil secondary wire (the connection to spark plug); – Black lead (-) on ignition coil ground; – normal reading ranges from 2000 to 6000 ohms, – failed if zero ohms (or no reading).