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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Ignition Coil: Testing and Inspection

(Figure 1) Testing Ignition Coil:






PROCEDURE
Check ignition coil with ohmmeter for opens and grounds, refer to figure 1:

1. Use high scale. Should read very high (infinite). If not, replace coil.
2. Use low scale. Should read very low or zero. If not, replace coil.
3. Use high scale. Should not read infinite. If it does, replace coil.