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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Alternator

CHARGING CIRCUIT WITH LOAD

With the engine running at 2000 rpm, turn the high beam headlights on and turn the heater blower switch to the "HI" position.
Check the reading on the ammeter.
Standard amperage 30 A or more

CHARGING CIRCUIT WITHOUT LOAD

Keep the engine speed at 2000 rpm and check the reading on the ammeter and voltmeter.
Standard amperage 10 A or less
Standard voltage 13.2 to 14.8 V