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

H-Tests



^ Start engine.

^ Tune radio to a station where interference is present.

^ Stop engine.

^ Remove three-pin alternator regulator connector and B+ eyelet.

^ Start engine.

^ Is interference present with connector removed?

YES -- Check the audio system to find the cause of the radio interference.

NO -- Replace alternator.