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 Pack: Description and Operation
IGNITION COIL/OPERATIONWhen the ignition power transistor is turned ON by the signal from the ECM, it sends current to the ignition coil primary windings. When primary current is shut OFF (via the power transistor) a high voltage is induced in the secondary coil.