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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Brake Fluid Level Sensor/Switch: Description and Operation





The brake fluid level switch is located in the brake fluid reservoir on the master cylinder. It senses the level of the brake fluid within the reservoir and when the level drops below an acceptable level, the switch closes and completes the ground circuit for the red BRAKE warning lamp. This turns on the red BRAKE warning lamp.