Operation CHARM: Car repair manuals for everyone.

Resistance Test

Secondary Coil Winding
1. Remove the high-tension leads.




2. Measure resistance of the secondary coil winding of each coil with an ohmmeter.

Secondary coil winding resistance: 8.7-12.9 K ohms @ 20° C (68° F)

3. If not within the specification, replace the ignition coil.

Insulation Resistance of Case
1. Remove the high-tension leads and disconnect the connectors.
2. Use a 500 V megger tester to measure the insulation resistance between the primary terminal and the coil case.

Resistance: Above 10 Mega Ohms

3. If not as specified, replace the ignition coil.