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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Federal

Solenoid Valve Check:






1. Remove solenoid valve.
2. Check that air flows between each port as shown, without battery connected.
3. Connect battery to solenoid terminals.
4. Verify that air flows between each port as shown.