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
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Front Door Window Motor: Testing and Inspection




Connect the motor terminals directly to battery voltage (12 V) and check that the motor operates smoothly Next, reverse the polarity and check that the motor operates smoothly in the reverse directions if the operation is abnormal, replace the motor.