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

A4 Check Circuit For Open







- Turn ignition switch OFF.

- Remove fuse from power distribution box. Disconnect anti-lock brake control module connectors.

- Using an ohmmeter, connect one lead to output side of fuse. Connect second lead to pins 1 and 2 at anti-lock brake control module connector.

- Measure resistance of circuit.

- Is resistance 5 ohms or less?

YES -- Go to A5. A5 Check Circuit For Open

NO -- Service circuit. Restore vehicle. Retest system.