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)

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Multi-Function Switch Continuity Test






Check the continuity between the switch terminals. Either a self-powered test light or an ohmmeter can be used to test a standard two-speed switch. An ohmmeter must be used to test a switch used with the interval wiper system.

To detect marginal operation of the multi-function switch, move the lever while each reading is being taken.

If the multi-function switch does not exhibit continuity or if poor continuity exists in any switch position, replace the multi-function switch.