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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Master Window Switch

With the ignition Switch in the RUN position, battery voltage is applied to the Master Window Switch via the 141 circuit. The switch assembly is grounded via the 141 circuit. When any Master Window UP Switch not associated with express down is operated, battery voltage is applied to the Window Motor. The motor is grounded through the DN contact in the Master Window Switch and it runs to drive the window up.

When any Master Window DN Switch is pressed past the first detent, battery voltage is applied to the Window Motor in the opposite direction. The motor is grounded through the UP contact in the Master Window Switch, and it runs to drive the window down.