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
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Ignition Cable: Testing and Inspection


Typical Wire Inspection:






CAUTION: Carefully remove the ignition wires by pulling on the boots. Do not bent the wire or the terminal may be broken.

1. Check the general condition of the wires. Look for corrosion and broken or distorted wires.
2. Connect an ohmmeter to the wire and measure the resistance.

Ignition Wire Resistance:
25,000 ohms max. @ 70~F (20~C)