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

CAUTION: Carefully remove the ignition wires by pulling on the rubber boots. Do not bend the wire or the conductor may be broken.

Spark Plug Wire Inspection:





1. Check the condition of the wire terminals. If any terminal is corroded, clean it and if it is broken or distorted, replace the wire.

Spark Plug Wire Resistance Inspection:






2. Connect ohmmeter probes and measure resistance.

Resistance: 25K Ohms max. at 20°C (68°F).

3. If resistance exceeds 25,000 Ohms, replace the ignition wire.