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

Battery: Testing and Inspection



61 20 503 Vehicle Battery-Closed-Circuit Current Monitoring







Necessary preliminary tasks:
To access negative lead of battery, perform the necessary preliminary work described in Disconnecting negative battery cable.
Do not disconnect negative lead of battery.







Connect BMW diagnosis system.
Connect clip-on probe to negative lead of battery. The arrow on the current clamp must point towards the battery.
Measure closed-circuit current.