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 Cable: Testing and Inspection

SPARK PLUG WIRES

1. Check spark plug wires for broken insulation and spark plug terminals for corrosion or damage. Replace spark plug(s) as necessary.
2. Using a suitable ohmmeter and measure resistance of each spark plug wire. Resistance value is 16K ohms per inch.