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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Blower System





Blower System
The blower relay is ready to be activated when the ignition switch is in the ON position. With the ignition switch ON, placing the fan switch in any position other than OFF activates the relay, allowing electric current to flow from the battery to the ground through the blower motor, the resistor, and the selected fan switch contacts. The connected resistor(s) vary depending on the selected position of the fan switch and cause the blower motor speed to change.