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 Open-Circuit Test




Battery Open-Circuit Current Test

Safety instructions for handling vehicle battery.
Carry out battery high-current test.







If the high-current test is O.K., excessive standby current consumption can cause the battery to discharge. In this case, carry out a closed-circuit current test with aid of Diagnosis and Information System (DIS).