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 Check

Meter Types:





1. Use a digital or analog multimeter with a minimum 10k 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.
a. When contacting the negative lead to the diode's positive side and the positive lead to the negative side, there should be continuity.
b. When connecting the two leads in reverse, there should not be continuity.