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: Description and Operation

When the brake fluid level in the master cylinder is low, the brake fluid level indicator sensor closes.
Ground is applied to the Electronic Brake Control Module (EBCM) through circuit 333 (PPL). When the EBCM senses the ground, the EBCM will send a class 2 signal to the instrument cluster which will illuminate the brake warning indicator.