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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Checking Control Buttons




Checking Control Buttons







- Ignition off.


Connect an ohmmeter between breakout box outlet to relevant button and ground (outlet 36).

The ohmmeter should read 0 [ohm] when the relevant button is activated.

Ok - Checking the Control Module

Not Ok - Checking For an Open-Circuit