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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Pick-Up Coil: Testing and Inspection


1. Connect an ohmmeter to terminals in coupler and check the resistance of the pick-up coil. Acceptable resistance is 650 +/- 50 ohms at 20°C (68°F) on both leading and trailing coils.
2. Connect an ammeter (on the 1ma range) to the terminals in the coupler and place a screwdriver on the magnet core of the pick-up coil. Make sure that the indicator of the meter moves when the screwdriver is quickly separated from the core.
3. Repeat test on both leading and trailing igniters.