Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Ignition Coil: Testing and Inspection

Ignition Coil Terminals:






1. Disconnect coil connector.
2. Measure resistance of coil primary and secondary windings as follows:

PRIMARY

Terminal: Resistance:
1 (+) & 2 (-) 0.81 - 0.99 Ohms

SECONDARY

Terminal: Resistance:
1 (+) & secondary 8.5k - 11.0k Ohms