Ignition Coil Test

Fig. 6 Ignition Coil Resistance Specifications:

Fig. 19 Measuring ignition coil supply voltage.:

Fig. 20 Measuring ignition coil primary coil resistance.:

Fig. 21 Checking ignition coil insulation resistance.:

1. Disconnect spark plug wires from ignition coil.
2. Disconnect ignition coil connectors.
3. Using suitable voltmeter, measure voltage at coil connector No. 2 connector, Fig. 19. There should be approximately 12 volts available.
4. Using suitable ohmmeter, measure resistance across coil connector positive and negative terminals, Fig. 20. Resistance should be within specifications shown in chart, Fig. 6.
5. Using ohmmeter, ensure no continuity exists between ignition coil terminal and ground, Fig. 21.
6. If coil does not pass any of the above tests, replace it.