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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Continuity and Resistance Check

Meter Types:





1. Use a digital or analog multimeter with a minimum 10 k Ohm resistance.
2. Disconnect the battery or connector so there is no power between the check points.
3. Set the ohmmeter to the appropriate range.

Continuity And Resistance Check:





4. Connect the two leads of the meter to each of the check points.

Diode Check:





5. If the circuit or component has diodes, reverse the leads and check again.
- When contacting the negative lead to the diode's positive side and the positive lead to the negative side, there should be continuity.
- When connecting the two leads in reverse, there should not be continuity.