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)

Or, hide this message: temporarily or permanently

Basic Tests

1. Use voltmeter to check that at least 12 volts is present directly across battery terminals. If it is not, test battery.
2. Use voltmeter to check that at least 12 volts is present across terminal 30 on starter motor and negative battery terminal.
3. Use voltmeter to check that operating voltage is present on +50 terminal. If it is not, check wiring between battery and starter motor.