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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Cranking Signal: Testing and Inspection


1. With ignition switch ``Off,'' remove left connector from ECM.
2. Insert positive tester probe into black/yellow lead wire terminal from cord side of disconnected left connector and negative tester probe connected to body ground, check that 12 volts is applied while starter is running.
3. If battery voltage is not present, check starter motor switch and starter circuit.
4. Turn ignition switch ``Off,'' the reconnect ECM connector.