2. Push the float into the master cylinder reservoir using a clean screwdriver. The control lamp should light up when the float drops below the mark «MIN», and go out when the float rises above it.
3. The sensor can also be tested with a tester. Connect the tester to the sensor connector. The circuit should close when the float falls below the mark «MIN», and open when the float rises above it.
4. Connect the connector to the sensor and install the tank cover.
Checking the operation of the brake fluid level sensor using a tester