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

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Using A Digital Volt/Ohmmeter For Resistance Measurements


When using a digital volt/ohmmeter to check resistance, make sure you determine any built in resistance of the meter by touching both leads together. For example, after touching leads together, meter indicates 0.6 ohms. This is your 0 point. When checking the circuit resistance 0 ohms would be 0.6 ohms and 1/2 ohm resistance would be 1.1 ohms.