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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Universal Breakout Box

Universal Breakout Box:






Used to test individual circuits in the system by monitoring voltage or resistance using a high impedance multimeter. Can also be used for pinout circuit checks by disconnecting the option adapters at the vehicle system control module. Refer to Powertrain Control Module (PCM) Connector End View tables in appropriate engine section for specific engine adapter harness J 39700-XXX.