Brake Fluid Switch Circuit Open

Monitored & Set Condition

When Monitored: With the ignition in the Run/Start position.
Set Condition: The Instrument Cluster performs open circuit detection on the Brake Fluid Level (Red Brake Warning Indicator Driver) switch and the sense circuit. Fault sets if an open circuit is detected. When this fault is detected the Instrument Cluster will illuminate the Brake warning indicator.

Possible Causes:

Intermittent Condition
Brake Fluid Level Switch
Brake Fluid Level Switch Ground Circuit
Red Brake Warning Indicator Driver Circuit
Instrument Cluster

Testing

NOTE: Ensure that the Brake Fluid Level Switch harness connector is properly connected.

With the DRBIII(R), erase DTCs. Cycle the ignition and wait approximately 15 seconds. With the DRBIII(R), read DTCs. Does the DRBIII(R) display BRAKE FLUID SWITCH CIRCUIT OPEN? If yes, go to next step. If no, the condition is not present at this time. Monitor DRBIII(R) parameters while wiggling the related wire harness. Refer to any Technical Service Bulletins (TSB) that may apply. Visually inspect the related wiring harness and connectors. Perform BODY VERIFICATION TEST .
Turn the ignition off. Disconnect the Brake Fluid Level Switch harness connector. Check the connectors. Clean and repair as necessary. Measure the internal resistance of the Brake Fluid Level (Red Brake Warning Indicator Driver) Switch. Is the resistance above 1.1k ohms? If yes, replace the Brake Fluid Level (Red Brake Warning Indicator Driver) Switch. Perform BODY VERIFICATION TEST . If no, go to next step.
Turn the ignition off. Disconnect the Brake Fluid Level Switch harness connector. Check connectors, clean and repair as necessary. Measure the resistance between ground and the Brake Fluid Level Switch Ground circuit. Is the resistance above 5.0 ohms? If yes, repair the Brake Fluid Level (Red Brake Warning Indicator Driver) Switch Ground circuit for an open. Perform BODY VERIFICATION TEST . If no, go to next step.
Turn the ignition off. Disconnect the Brake Fluid Level Switch harness connector. Disconnect the Instrument Cluster harness connector. Measure the resistance of the Red Brake Warning Indicator Driver circuit. Is the resistance above 5.0 ohms? If yes, repair the Red Brake Warning Indicator Driver circuit for an open. Perform BODY VERIFICATION TEST . If no, replace the Instrument Cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION in ANALOG INSTRUMENT PANELS - LIBERTY article. Perform BODY VERIFICATION TEST .