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 the Power Supply to the Control Module




Checking The Power Supply To The Control Module







- Ignition off.
- Stop (brake) lamp switch connected.
- Brake pedal unaffected.
- Disconnect the control module.
- Ignition on.

Connect a voltmeter between control module connector terminal 7 and ground.

The voltmeter should read approximately 0 V.

OK - Checking the Resistance In the Signal Cable

NOT OK - Checking For A Short-Circuit - I